/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/unroll-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:55:30,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:55:30,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:55:30,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:55:30,807 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 [2021-06-05 13:55:30,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:55:30,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:55:30,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:55:30,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:55:30,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:55:30,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:55:30,828 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:55:30,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:55:30,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:55:30,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:55:30,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:55:30,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:55:30,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:55:30,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:55:30,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:55:30,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:55:30,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:55:30,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:55:30,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:55:30,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:55:30,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:55:30,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:55:30,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:55:30,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:55:30,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:55:30,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:55:30,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:55:30,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:55:30,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:55:30,832 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:55:30,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:55:30,832 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:55:30,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:55:31,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:55:31,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:55:31,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:55:31,149 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:55:31,150 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:55:31,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-06-05 13:55:31,151 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-06-05 13:55:31,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:55:31,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:55:31,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:55:31,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:55:31,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:55:31,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:55:31,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:55:31,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:55:31,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:55:31,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/1) ... [2021-06-05 13:55:31,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:55:31,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:55:31,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:55:31,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:55:31,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (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 [2021-06-05 13:55:31,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:55:31,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:55:31,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:55:31,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:55:31,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:55:31,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:55:31,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:55:31,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:55:31,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:55:31,336 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:55:31,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:55:31,551 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:55:31,551 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 13:55:31,552 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 13:55:31,553 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:55:31 BoogieIcfgContainer [2021-06-05 13:55:31,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:55:31,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:55:31,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:55:31,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:55:31,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:55:31" (1/2) ... [2021-06-05 13:55:31,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182550b4 and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:55:31, skipping insertion in model container [2021-06-05 13:55:31,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:55:31" (2/2) ... [2021-06-05 13:55:31,560 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-06-05 13:55:31,565 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:55:31,565 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:55:31,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:55:31,566 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:55:31,592 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:55:31,634 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:55:31,666 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:55:31,667 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:55:31,667 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:55:31,667 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:55:31,667 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:55:31,667 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:55:31,667 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:55:31,667 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:55:31,690 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 13:55:31,709 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-05 13:55:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-05 13:55:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:55:31,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:31,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:31,716 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-06-05 13:55:31,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:31,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071276521] [2021-06-05 13:55:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:31,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:31,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071276521] [2021-06-05 13:55:31,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071276521] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:55:31,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:55:31,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:55:31,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110703764] [2021-06-05 13:55:31,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:55:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:31,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:55:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:55:31,869 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:31,886 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 13:55:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:55:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 13:55:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:31,895 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:55:31,895 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 13:55:31,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:55:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 13:55:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 13:55:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-06-05 13:55:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 13:55:31,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 13:55:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:31,922 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 13:55:31,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 13:55:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:55:31,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:31,923 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:31,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:55:31,924 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-06-05 13:55:31,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:31,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299612549] [2021-06-05 13:55:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:31,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299612549] [2021-06-05 13:55:31,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299612549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371671408] [2021-06-05 13:55:31,960 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 [2021-06-05 13:55:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 13:55:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:32,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371671408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:32,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:32,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 13:55:32,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008362528] [2021-06-05 13:55:32,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:55:32,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:55:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:55:32,074 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2021-06-05 13:55:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:32,110 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 13:55:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:55:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 10 [2021-06-05 13:55:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:32,111 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:55:32,111 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 13:55:32,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:55:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 13:55:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 13:55:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 13:55:32,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 13:55:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:32,117 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 13:55:32,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) 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) [2021-06-05 13:55:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 13:55:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:55:32,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:32,118 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:32,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:55:32,337 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-06-05 13:55:32,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:32,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472144444] [2021-06-05 13:55:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:32,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:32,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472144444] [2021-06-05 13:55:32,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472144444] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:55:32,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:55:32,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:55:32,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240338542] [2021-06-05 13:55:32,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:55:32,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:32,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:55:32,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:55:32,367 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:32,405 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 13:55:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:55:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:55:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:32,411 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:55:32,411 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 13:55:32,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:55:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 13:55:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 13:55:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-06-05 13:55:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 13:55:32,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 13:55:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:32,415 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 13:55:32,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 13:55:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:55:32,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:32,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:32,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:55:32,416 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:32,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:32,417 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-06-05 13:55:32,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:32,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663710178] [2021-06-05 13:55:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:32,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:32,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663710178] [2021-06-05 13:55:32,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663710178] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:55:32,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:55:32,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:55:32,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061326111] [2021-06-05 13:55:32,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:55:32,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:32,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:55:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:55:32,472 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:32,495 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 13:55:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:55:32,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:55:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:32,497 INFO L225 Difference]: With dead ends: 20 [2021-06-05 13:55:32,497 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 13:55:32,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:55:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 13:55:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 13:55:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 13:55:32,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 13:55:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:32,504 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 13:55:32,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 13:55:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:55:32,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:32,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:32,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:55:32,505 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:32,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:32,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-06-05 13:55:32,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:32,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756266696] [2021-06-05 13:55:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:32,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:32,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756266696] [2021-06-05 13:55:32,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756266696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:32,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163680098] [2021-06-05 13:55:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 13:55:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:55:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:32,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163680098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:32,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:32,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 13:55:32,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869808260] [2021-06-05 13:55:32,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:55:32,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:55:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:55:32,666 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:32,689 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 13:55:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:55:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:55:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:32,691 INFO L225 Difference]: With dead ends: 24 [2021-06-05 13:55:32,692 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 13:55:32,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:55:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 13:55:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 13:55:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 13:55:32,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 13:55:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:32,702 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 13:55:32,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 13:55:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:55:32,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:32,704 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:32,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:32,925 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:32,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-06-05 13:55:32,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:32,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222779887] [2021-06-05 13:55:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:32,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222779887] [2021-06-05 13:55:32,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222779887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162209315] [2021-06-05 13:55:32,976 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 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 [2021-06-05 13:55:33,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:33,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:33,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:55:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:33,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162209315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:33,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:33,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 13:55:33,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942246132] [2021-06-05 13:55:33,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:55:33,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:55:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:55:33,084 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:33,118 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 13:55:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:55:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:33,120 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:55:33,120 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 13:55:33,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:55:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 13:55:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 13:55:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 13:55:33,130 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 13:55:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:33,131 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 13:55:33,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 13:55:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:55:33,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:33,131 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:33,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:33,332 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-06-05 13:55:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:33,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053493892] [2021-06-05 13:55:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:33,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:33,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053493892] [2021-06-05 13:55:33,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053493892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:33,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804301718] [2021-06-05 13:55:33,415 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 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 [2021-06-05 13:55:33,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:55:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:55:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:33,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:33,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:55:33,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:33,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:33,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:33,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:55:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:33,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804301718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:33,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:33,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 13:55:33,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85407140] [2021-06-05 13:55:33,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:33,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:33,621 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-05 13:55:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:33,664 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-06-05 13:55:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 13 [2021-06-05 13:55:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:33,665 INFO L225 Difference]: With dead ends: 67 [2021-06-05 13:55:33,665 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 13:55:33,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 13:55:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-06-05 13:55:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-06-05 13:55:33,670 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-06-05 13:55:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:33,670 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-06-05 13:55:33,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-05 13:55:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-06-05 13:55:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:55:33,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:33,671 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:33,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:33,894 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-06-05 13:55:33,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:33,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15523015] [2021-06-05 13:55:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:33,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:33,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15523015] [2021-06-05 13:55:33,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15523015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:33,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272710964] [2021-06-05 13:55:33,942 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 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 [2021-06-05 13:55:33,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:33,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:55:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:34,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:34,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:55:34,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:34,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:34,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:34,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:55:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:34,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272710964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:34,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:34,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 13:55:34,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923349761] [2021-06-05 13:55:34,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:34,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:34,126 INFO L87 Difference]: Start difference. First operand 39 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:34,166 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-06-05 13:55:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13 [2021-06-05 13:55:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:34,168 INFO L225 Difference]: With dead ends: 75 [2021-06-05 13:55:34,168 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 13:55:34,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 13:55:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-06-05 13:55:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-06-05 13:55:34,172 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-06-05 13:55:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:34,173 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-06-05 13:55:34,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-06-05 13:55:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:55:34,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:34,174 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:34,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 13:55:34,389 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-06-05 13:55:34,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:34,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815017415] [2021-06-05 13:55:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:34,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815017415] [2021-06-05 13:55:34,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815017415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050057422] [2021-06-05 13:55:34,426 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 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 [2021-06-05 13:55:34,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:55:34,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:55:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:34,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:34,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:55:34,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:34,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:34,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:34,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:55:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:34,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050057422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:34,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:34,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 13:55:34,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873465310] [2021-06-05 13:55:34,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:34,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:34,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:34,591 INFO L87 Difference]: Start difference. First operand 45 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:34,651 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-06-05 13:55:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13 [2021-06-05 13:55:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:34,653 INFO L225 Difference]: With dead ends: 83 [2021-06-05 13:55:34,653 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 13:55:34,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 13:55:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-06-05 13:55:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-06-05 13:55:34,670 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-06-05 13:55:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:34,670 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-06-05 13:55:34,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-06-05 13:55:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:55:34,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:34,671 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:34,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:34,872 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-06-05 13:55:34,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:34,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446101044] [2021-06-05 13:55:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:34,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446101044] [2021-06-05 13:55:34,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446101044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370810168] [2021-06-05 13:55:34,907 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 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 [2021-06-05 13:55:34,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:55:34,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:55:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:35,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:55:35,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:35,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:35,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:35,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:55:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:35,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370810168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:35,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:35,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 13:55:35,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664516776] [2021-06-05 13:55:35,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:35,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:35,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:35,097 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:35,165 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-06-05 13:55:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:35,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13 [2021-06-05 13:55:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:35,167 INFO L225 Difference]: With dead ends: 92 [2021-06-05 13:55:35,167 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 13:55:35,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 13:55:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-06-05 13:55:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 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) [2021-06-05 13:55:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-06-05 13:55:35,179 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-06-05 13:55:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:35,179 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-06-05 13:55:35,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-06-05 13:55:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:35,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:35,180 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:35,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 13:55:35,397 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:35,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-06-05 13:55:35,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:35,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493157238] [2021-06-05 13:55:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:35,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:35,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493157238] [2021-06-05 13:55:35,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493157238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:35,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192707080] [2021-06-05 13:55:35,459 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 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 [2021-06-05 13:55:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:35,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:35,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:35,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192707080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:35,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:35,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:55:35,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170469163] [2021-06-05 13:55:35,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:35,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:35,565 INFO L87 Difference]: Start difference. First operand 61 states and 155 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:35,671 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-05 13:55:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:55:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:35,672 INFO L225 Difference]: With dead ends: 114 [2021-06-05 13:55:35,672 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 13:55:35,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 13:55:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-06-05 13:55:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 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) [2021-06-05 13:55:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-06-05 13:55:35,687 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-06-05 13:55:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:35,687 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-06-05 13:55:35,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-06-05 13:55:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:35,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:35,692 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:35,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 13:55:35,906 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-06-05 13:55:35,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:35,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57002928] [2021-06-05 13:55:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:35,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:35,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57002928] [2021-06-05 13:55:35,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57002928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:35,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846753427] [2021-06-05 13:55:35,961 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 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 [2021-06-05 13:55:36,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:36,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:36,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846753427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:36,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:36,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:55:36,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327590160] [2021-06-05 13:55:36,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:36,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:36,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:36,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:36,041 INFO L87 Difference]: Start difference. First operand 62 states and 159 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:36,151 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-06-05 13:55:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:55:36,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:36,153 INFO L225 Difference]: With dead ends: 121 [2021-06-05 13:55:36,153 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 13:55:36,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 13:55:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-06-05 13:55:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-06-05 13:55:36,161 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-06-05 13:55:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:36,161 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-06-05 13:55:36,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-06-05 13:55:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:36,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:36,162 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:36,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:36,377 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:36,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-06-05 13:55:36,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:36,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97193293] [2021-06-05 13:55:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:36,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97193293] [2021-06-05 13:55:36,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97193293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345137959] [2021-06-05 13:55:36,424 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 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 [2021-06-05 13:55:36,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:55:36,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:36,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345137959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:36,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:36,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 13:55:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045338224] [2021-06-05 13:55:36,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:36,534 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-05 13:55:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:36,777 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-06-05 13:55:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:55:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 [2021-06-05 13:55:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:36,779 INFO L225 Difference]: With dead ends: 137 [2021-06-05 13:55:36,779 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 13:55:36,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 13:55:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-06-05 13:55:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-06-05 13:55:36,785 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-06-05 13:55:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:36,787 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-06-05 13:55:36,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-05 13:55:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-06-05 13:55:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:36,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:36,789 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:37,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:37,005 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-06-05 13:55:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:37,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308564325] [2021-06-05 13:55:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:37,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:37,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308564325] [2021-06-05 13:55:37,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308564325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525103048] [2021-06-05 13:55:37,047 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 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 [2021-06-05 13:55:37,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:37,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:37,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:37,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525103048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:37,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:55:37,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740479623] [2021-06-05 13:55:37,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:55:37,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:55:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:55:37,123 INFO L87 Difference]: Start difference. First operand 104 states and 269 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:37,164 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-06-05 13:55:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:55:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:37,166 INFO L225 Difference]: With dead ends: 162 [2021-06-05 13:55:37,166 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 13:55:37,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 13:55:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-06-05 13:55:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 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) [2021-06-05 13:55:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-06-05 13:55:37,171 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-06-05 13:55:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:37,171 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-06-05 13:55:37,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-06-05 13:55:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:37,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:37,172 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:37,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 13:55:37,385 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-06-05 13:55:37,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:37,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874889158] [2021-06-05 13:55:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:37,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:37,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874889158] [2021-06-05 13:55:37,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874889158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793872660] [2021-06-05 13:55:37,424 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 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 [2021-06-05 13:55:37,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:55:37,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:37,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:37,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793872660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:37,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:55:37,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329964035] [2021-06-05 13:55:37,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:55:37,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:37,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:55:37,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:55:37,483 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:37,562 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-06-05 13:55:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:37,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:37,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:37,564 INFO L225 Difference]: With dead ends: 170 [2021-06-05 13:55:37,564 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 13:55:37,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 13:55:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-06-05 13:55:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 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) [2021-06-05 13:55:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-06-05 13:55:37,568 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-06-05 13:55:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:37,568 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-06-05 13:55:37,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-06-05 13:55:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:37,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:37,569 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:37,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:55:37,784 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-06-05 13:55:37,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:37,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051815775] [2021-06-05 13:55:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:37,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:37,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051815775] [2021-06-05 13:55:37,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051815775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708666602] [2021-06-05 13:55:37,857 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 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 [2021-06-05 13:55:37,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:55:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:37,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:37,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708666602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:37,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:55:37,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564192645] [2021-06-05 13:55:37,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:55:37,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:37,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:55:37,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:55:37,929 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:37,972 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-06-05 13:55:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:55:37,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:37,973 INFO L225 Difference]: With dead ends: 174 [2021-06-05 13:55:37,973 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 13:55:37,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 13:55:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-06-05 13:55:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 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) [2021-06-05 13:55:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-06-05 13:55:37,978 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-06-05 13:55:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:37,979 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-06-05 13:55:37,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-06-05 13:55:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:37,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:37,979 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:38,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:55:38,193 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:38,193 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-06-05 13:55:38,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:38,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6567999] [2021-06-05 13:55:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:38,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:38,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6567999] [2021-06-05 13:55:38,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6567999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:38,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370797878] [2021-06-05 13:55:38,234 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 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 [2021-06-05 13:55:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:38,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:38,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370797878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:38,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:38,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:55:38,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679211986] [2021-06-05 13:55:38,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:38,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:38,316 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:38,390 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-06-05 13:55:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:38,392 INFO L225 Difference]: With dead ends: 188 [2021-06-05 13:55:38,392 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 13:55:38,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 13:55:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-06-05 13:55:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-06-05 13:55:38,397 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-06-05 13:55:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:38,398 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-06-05 13:55:38,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-06-05 13:55:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:38,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:38,398 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:38,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:38,617 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-06-05 13:55:38,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:38,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953052738] [2021-06-05 13:55:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:38,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:38,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953052738] [2021-06-05 13:55:38,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953052738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:38,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087010003] [2021-06-05 13:55:38,653 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 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 [2021-06-05 13:55:38,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:38,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:38,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087010003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:38,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:38,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:55:38,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676224859] [2021-06-05 13:55:38,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:55:38,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:38,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:55:38,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:55:38,717 INFO L87 Difference]: Start difference. First operand 114 states and 301 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:38,781 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-06-05 13:55:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:38,782 INFO L225 Difference]: With dead ends: 182 [2021-06-05 13:55:38,782 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 13:55:38,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 13:55:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-06-05 13:55:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 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) [2021-06-05 13:55:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 13:55:38,786 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 13:55:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:38,787 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 13:55:38,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 13:55:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:38,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:38,787 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:39,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:55:39,001 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-06-05 13:55:39,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:39,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064618688] [2021-06-05 13:55:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:39,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064618688] [2021-06-05 13:55:39,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064618688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070918442] [2021-06-05 13:55:39,031 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 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 [2021-06-05 13:55:39,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:55:39,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070918442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:39,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:55:39,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140935933] [2021-06-05 13:55:39,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:55:39,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:55:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:55:39,086 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:39,121 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-06-05 13:55:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:55:39,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:39,123 INFO L225 Difference]: With dead ends: 185 [2021-06-05 13:55:39,124 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 13:55:39,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 13:55:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-06-05 13:55:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 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) [2021-06-05 13:55:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 13:55:39,128 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 13:55:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:39,128 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 13:55:39,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 13:55:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:39,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:39,128 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:39,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:39,349 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-06-05 13:55:39,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:39,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288294638] [2021-06-05 13:55:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:39,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288294638] [2021-06-05 13:55:39,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288294638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281640913] [2021-06-05 13:55:39,387 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 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 [2021-06-05 13:55:39,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:39,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:39,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:39,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281640913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:39,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:55:39,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027651993] [2021-06-05 13:55:39,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:39,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:39,454 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:39,524 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-06-05 13:55:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:39,526 INFO L225 Difference]: With dead ends: 194 [2021-06-05 13:55:39,526 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 13:55:39,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 13:55:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-06-05 13:55:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 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) [2021-06-05 13:55:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 13:55:39,530 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 13:55:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:39,530 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 13:55:39,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 13:55:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:39,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:39,531 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:39,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 13:55:39,745 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:39,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-06-05 13:55:39,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:39,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173912694] [2021-06-05 13:55:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:39,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173912694] [2021-06-05 13:55:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173912694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612537622] [2021-06-05 13:55:39,786 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 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 [2021-06-05 13:55:39,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:55:39,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:39,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:39,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612537622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:39,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:55:39,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277878003] [2021-06-05 13:55:39,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:39,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:39,864 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:39,956 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-06-05 13:55:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:39,957 INFO L225 Difference]: With dead ends: 201 [2021-06-05 13:55:39,957 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 13:55:39,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 13:55:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-06-05 13:55:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 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) [2021-06-05 13:55:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-06-05 13:55:39,962 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-06-05 13:55:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:39,962 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-06-05 13:55:39,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-06-05 13:55:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:39,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:39,963 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:40,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 13:55:40,169 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-06-05 13:55:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:40,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032014430] [2021-06-05 13:55:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:40,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:40,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032014430] [2021-06-05 13:55:40,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032014430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:40,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687730533] [2021-06-05 13:55:40,219 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 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 [2021-06-05 13:55:40,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:55:40,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:40,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687730533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:40,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:40,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 13:55:40,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434843919] [2021-06-05 13:55:40,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:40,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:40,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:40,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:40,303 INFO L87 Difference]: Start difference. First operand 132 states and 359 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-05 13:55:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:40,405 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-06-05 13:55:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:55:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14 [2021-06-05 13:55:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:40,407 INFO L225 Difference]: With dead ends: 208 [2021-06-05 13:55:40,407 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 13:55:40,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 13:55:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-06-05 13:55:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 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) [2021-06-05 13:55:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-06-05 13:55:40,413 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-06-05 13:55:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:40,414 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-06-05 13:55:40,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-05 13:55:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-06-05 13:55:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:40,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:40,414 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:40,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:40,639 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-06-05 13:55:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:40,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103422979] [2021-06-05 13:55:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:40,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103422979] [2021-06-05 13:55:40,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103422979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570749765] [2021-06-05 13:55:40,680 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 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 [2021-06-05 13:55:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:40,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570749765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:40,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:40,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 13:55:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039594839] [2021-06-05 13:55:40,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:40,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:40,766 INFO L87 Difference]: Start difference. First operand 151 states and 420 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-05 13:55:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:40,839 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-06-05 13:55:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:55:40,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14 [2021-06-05 13:55:40,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:40,841 INFO L225 Difference]: With dead ends: 199 [2021-06-05 13:55:40,841 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 13:55:40,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 13:55:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-06-05 13:55:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 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) [2021-06-05 13:55:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-06-05 13:55:40,847 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-06-05 13:55:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:40,847 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-06-05 13:55:40,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-05 13:55:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-06-05 13:55:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:40,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:40,848 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:41,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 13:55:41,072 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:41,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-06-05 13:55:41,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:41,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149687607] [2021-06-05 13:55:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:41,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:41,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149687607] [2021-06-05 13:55:41,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149687607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:41,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203322027] [2021-06-05 13:55:41,113 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 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 [2021-06-05 13:55:41,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:41,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:41,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:41,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203322027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:41,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:41,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:55:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111951199] [2021-06-05 13:55:41,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:41,196 INFO L87 Difference]: Start difference. First operand 148 states and 407 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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) [2021-06-05 13:55:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:41,303 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-06-05 13:55:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:55:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 14 [2021-06-05 13:55:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:41,304 INFO L225 Difference]: With dead ends: 203 [2021-06-05 13:55:41,305 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 13:55:41,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 13:55:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-06-05 13:55:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 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) [2021-06-05 13:55:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-06-05 13:55:41,309 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-06-05 13:55:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:41,309 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-06-05 13:55:41,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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) [2021-06-05 13:55:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-06-05 13:55:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:41,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:41,310 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:41,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 13:55:41,525 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-06-05 13:55:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:41,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814346577] [2021-06-05 13:55:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:41,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814346577] [2021-06-05 13:55:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814346577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230336785] [2021-06-05 13:55:41,569 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 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 [2021-06-05 13:55:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:55:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230336785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:41,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:41,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:55:41,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041408579] [2021-06-05 13:55:41,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:41,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:41,643 INFO L87 Difference]: Start difference. First operand 144 states and 393 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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) [2021-06-05 13:55:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:41,731 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-06-05 13:55:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 14 [2021-06-05 13:55:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:41,732 INFO L225 Difference]: With dead ends: 179 [2021-06-05 13:55:41,732 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 13:55:41,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 13:55:41,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-06-05 13:55:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 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) [2021-06-05 13:55:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-06-05 13:55:41,736 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-06-05 13:55:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:41,736 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-06-05 13:55:41,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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) [2021-06-05 13:55:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-06-05 13:55:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:55:41,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:41,738 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:41,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:41,945 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:41,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-06-05 13:55:41,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:41,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590439024] [2021-06-05 13:55:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:41,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:41,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590439024] [2021-06-05 13:55:41,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590439024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:41,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961724996] [2021-06-05 13:55:41,990 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 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 [2021-06-05 13:55:42,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:42,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961724996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:42,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:42,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:55:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892885169] [2021-06-05 13:55:42,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:42,085 INFO L87 Difference]: Start difference. First operand 141 states and 383 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-06-05 13:55:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:42,244 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-06-05 13:55:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 14 [2021-06-05 13:55:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:42,245 INFO L225 Difference]: With dead ends: 200 [2021-06-05 13:55:42,245 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 13:55:42,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 13:55:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-06-05 13:55:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 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) [2021-06-05 13:55:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-06-05 13:55:42,249 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-06-05 13:55:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:42,249 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-06-05 13:55:42,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-06-05 13:55:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-06-05 13:55:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:42,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:42,250 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:42,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 13:55:42,473 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:42,473 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-06-05 13:55:42,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:42,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392068350] [2021-06-05 13:55:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:42,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:42,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392068350] [2021-06-05 13:55:42,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392068350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:42,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180790795] [2021-06-05 13:55:42,507 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 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 [2021-06-05 13:55:42,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:55:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:55:42,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180790795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:42,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:42,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 13:55:42,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614028778] [2021-06-05 13:55:42,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:42,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:42,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:42,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:42,563 INFO L87 Difference]: Start difference. First operand 142 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-06-05 13:55:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:42,614 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-06-05 13:55:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:55:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 [2021-06-05 13:55:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:42,615 INFO L225 Difference]: With dead ends: 197 [2021-06-05 13:55:42,615 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 13:55:42,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 13:55:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-06-05 13:55:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-06-05 13:55:42,620 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-06-05 13:55:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:42,620 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-06-05 13:55:42,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-06-05 13:55:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-06-05 13:55:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:42,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:42,620 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:42,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:42,837 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-06-05 13:55:42,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:42,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680974630] [2021-06-05 13:55:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:42,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:42,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680974630] [2021-06-05 13:55:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680974630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:42,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478227004] [2021-06-05 13:55:42,883 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 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 [2021-06-05 13:55:42,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:55:42,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:42,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:42,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:42,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478227004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:42,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:42,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-06-05 13:55:42,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420261365] [2021-06-05 13:55:42,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:42,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:42,940 INFO L87 Difference]: Start difference. First operand 146 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-05 13:55:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:43,015 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-06-05 13:55:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 15 [2021-06-05 13:55:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:43,016 INFO L225 Difference]: With dead ends: 194 [2021-06-05 13:55:43,016 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 13:55:43,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 13:55:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-06-05 13:55:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 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) [2021-06-05 13:55:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-06-05 13:55:43,020 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-06-05 13:55:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:43,020 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-06-05 13:55:43,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-05 13:55:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-06-05 13:55:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:43,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:43,021 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:43,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:55:43,233 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-06-05 13:55:43,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:43,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403998224] [2021-06-05 13:55:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:43,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:43,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403998224] [2021-06-05 13:55:43,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403998224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:43,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487094143] [2021-06-05 13:55:43,275 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 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 [2021-06-05 13:55:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:43,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:43,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487094143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:43,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:43,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 13:55:43,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930309083] [2021-06-05 13:55:43,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:43,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:43,337 INFO L87 Difference]: Start difference. First operand 146 states and 396 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:43,414 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-06-05 13:55:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:55:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 15 [2021-06-05 13:55:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:43,417 INFO L225 Difference]: With dead ends: 179 [2021-06-05 13:55:43,417 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 13:55:43,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 13:55:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-06-05 13:55:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 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) [2021-06-05 13:55:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-06-05 13:55:43,423 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-06-05 13:55:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:43,423 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-06-05 13:55:43,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-06-05 13:55:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:43,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:43,425 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:43,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:55:43,639 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-06-05 13:55:43,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:43,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273750672] [2021-06-05 13:55:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:43,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273750672] [2021-06-05 13:55:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273750672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63287593] [2021-06-05 13:55:43,680 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 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 [2021-06-05 13:55:43,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:43,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:43,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:55:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63287593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:43,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:43,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 13:55:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267196216] [2021-06-05 13:55:43,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:43,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:43,739 INFO L87 Difference]: Start difference. First operand 147 states and 397 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-06-05 13:55:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:43,789 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-06-05 13:55:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:55:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 [2021-06-05 13:55:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:43,791 INFO L225 Difference]: With dead ends: 220 [2021-06-05 13:55:43,791 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 13:55:43,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 13:55:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-06-05 13:55:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-06-05 13:55:43,795 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-06-05 13:55:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:43,795 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-06-05 13:55:43,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-06-05 13:55:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-06-05 13:55:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:43,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:43,796 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:44,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 13:55:44,019 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:44,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:44,019 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-06-05 13:55:44,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:44,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276458946] [2021-06-05 13:55:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:44,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:44,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276458946] [2021-06-05 13:55:44,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276458946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:44,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364977910] [2021-06-05 13:55:44,054 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:44,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:55:44,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:55:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364977910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:44,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:44,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:55:44,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358521142] [2021-06-05 13:55:44,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:55:44,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:55:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:55:44,127 INFO L87 Difference]: Start difference. First operand 151 states and 410 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:44,202 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-06-05 13:55:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:55:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:44,204 INFO L225 Difference]: With dead ends: 207 [2021-06-05 13:55:44,204 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 13:55:44,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 13:55:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-06-05 13:55:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-06-05 13:55:44,208 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-06-05 13:55:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:44,208 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-06-05 13:55:44,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-06-05 13:55:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:44,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:44,209 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:44,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:44,433 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-06-05 13:55:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:44,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070361790] [2021-06-05 13:55:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:44,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070361790] [2021-06-05 13:55:44,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070361790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661688122] [2021-06-05 13:55:44,473 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 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 [2021-06-05 13:55:44,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:44,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:44,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661688122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:44,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:44,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 13:55:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974873815] [2021-06-05 13:55:44,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:44,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:44,535 INFO L87 Difference]: Start difference. First operand 151 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:44,626 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-06-05 13:55:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:55:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 15 [2021-06-05 13:55:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:44,627 INFO L225 Difference]: With dead ends: 212 [2021-06-05 13:55:44,627 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 13:55:44,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 13:55:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-06-05 13:55:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 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) [2021-06-05 13:55:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-06-05 13:55:44,631 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-06-05 13:55:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:44,632 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-06-05 13:55:44,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-06-05 13:55:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:44,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:44,632 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:44,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 13:55:44,849 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:44,849 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-06-05 13:55:44,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:44,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412730759] [2021-06-05 13:55:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:44,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:44,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412730759] [2021-06-05 13:55:44,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412730759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:44,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57401753] [2021-06-05 13:55:44,892 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 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 [2021-06-05 13:55:44,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:55:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:44,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57401753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:44,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:44,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 13:55:44,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684061608] [2021-06-05 13:55:44,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:44,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:44,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:44,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:44,958 INFO L87 Difference]: Start difference. First operand 151 states and 407 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:45,037 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-06-05 13:55:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:45,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 15 [2021-06-05 13:55:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:45,038 INFO L225 Difference]: With dead ends: 182 [2021-06-05 13:55:45,039 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 13:55:45,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 13:55:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 13:55:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-06-05 13:55:45,042 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-06-05 13:55:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:45,042 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-06-05 13:55:45,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-05 13:55:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-06-05 13:55:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:45,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:45,043 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:45,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:45,253 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-06-05 13:55:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:45,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117612336] [2021-06-05 13:55:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:45,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:45,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117612336] [2021-06-05 13:55:45,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117612336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042883580] [2021-06-05 13:55:45,299 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 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 [2021-06-05 13:55:45,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:45,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:45,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042883580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:45,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-06-05 13:55:45,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512904142] [2021-06-05 13:55:45,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:45,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:45,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:45,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:45,362 INFO L87 Difference]: Start difference. First operand 151 states and 406 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-06-05 13:55:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:45,421 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-06-05 13:55:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:45,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 15 [2021-06-05 13:55:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:45,423 INFO L225 Difference]: With dead ends: 262 [2021-06-05 13:55:45,423 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 13:55:45,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 13:55:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-06-05 13:55:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-06-05 13:55:45,428 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-06-05 13:55:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:45,428 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-06-05 13:55:45,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-06-05 13:55:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-06-05 13:55:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:45,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:45,429 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:45,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 13:55:45,651 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-06-05 13:55:45,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:45,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25776652] [2021-06-05 13:55:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:45,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25776652] [2021-06-05 13:55:45,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25776652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588259413] [2021-06-05 13:55:45,692 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 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 [2021-06-05 13:55:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:45,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:45,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:55:45,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588259413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:45,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-06-05 13:55:45,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039300170] [2021-06-05 13:55:45,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:55:45,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:45,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:55:45,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:55:45,747 INFO L87 Difference]: Start difference. First operand 175 states and 494 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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) [2021-06-05 13:55:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:45,819 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-06-05 13:55:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:55:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 [2021-06-05 13:55:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:45,820 INFO L225 Difference]: With dead ends: 242 [2021-06-05 13:55:45,820 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 13:55:45,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 13:55:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-06-05 13:55:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 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) [2021-06-05 13:55:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-06-05 13:55:45,825 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-06-05 13:55:45,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:45,825 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-06-05 13:55:45,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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) [2021-06-05 13:55:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-06-05 13:55:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:45,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:45,826 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:46,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 13:55:46,048 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-06-05 13:55:46,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:46,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754215403] [2021-06-05 13:55:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:46,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:46,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754215403] [2021-06-05 13:55:46,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754215403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371734001] [2021-06-05 13:55:46,093 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 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 [2021-06-05 13:55:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:46,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:46,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371734001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:46,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 13:55:46,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251059010] [2021-06-05 13:55:46,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:46,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:46,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:46,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:46,173 INFO L87 Difference]: Start difference. First operand 175 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-06-05 13:55:46,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:46,263 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-06-05 13:55:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:55:46,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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 [2021-06-05 13:55:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:46,265 INFO L225 Difference]: With dead ends: 247 [2021-06-05 13:55:46,265 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 13:55:46,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 13:55:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-06-05 13:55:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 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) [2021-06-05 13:55:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-06-05 13:55:46,270 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-06-05 13:55:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:46,270 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-06-05 13:55:46,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-06-05 13:55:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-06-05 13:55:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:46,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:46,271 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:46,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 13:55:46,471 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-06-05 13:55:46,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:46,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593174236] [2021-06-05 13:55:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:46,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:46,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593174236] [2021-06-05 13:55:46,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593174236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18787426] [2021-06-05 13:55:46,513 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 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 [2021-06-05 13:55:46,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:55:46,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:46,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18787426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:46,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 13:55:46,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905026838] [2021-06-05 13:55:46,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:46,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:46,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:46,574 INFO L87 Difference]: Start difference. First operand 179 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-06-05 13:55:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:46,655 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-06-05 13:55:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:55:46,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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 [2021-06-05 13:55:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:46,656 INFO L225 Difference]: With dead ends: 219 [2021-06-05 13:55:46,656 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 13:55:46,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 13:55:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-06-05 13:55:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 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) [2021-06-05 13:55:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-06-05 13:55:46,661 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-06-05 13:55:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:46,661 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-06-05 13:55:46,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-06-05 13:55:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-06-05 13:55:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:55:46,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:46,662 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:46,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 13:55:46,870 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-06-05 13:55:46,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:46,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573376557] [2021-06-05 13:55:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:46,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:46,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573376557] [2021-06-05 13:55:46,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573376557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840887743] [2021-06-05 13:55:46,915 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 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 [2021-06-05 13:55:46,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:46,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:46,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:55:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:46,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840887743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:46,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 13:55:46,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390702529] [2021-06-05 13:55:46,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:46,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:46,988 INFO L87 Difference]: Start difference. First operand 179 states and 505 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-05 13:55:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:47,069 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-06-05 13:55:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 15 [2021-06-05 13:55:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:47,070 INFO L225 Difference]: With dead ends: 212 [2021-06-05 13:55:47,070 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 13:55:47,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 13:55:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-06-05 13:55:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 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) [2021-06-05 13:55:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-06-05 13:55:47,074 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-06-05 13:55:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:47,074 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-06-05 13:55:47,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-05 13:55:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-06-05 13:55:47,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:55:47,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:47,075 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:47,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:55:47,299 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-06-05 13:55:47,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:47,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314500125] [2021-06-05 13:55:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:55:47,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:47,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314500125] [2021-06-05 13:55:47,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314500125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:47,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75711453] [2021-06-05 13:55:47,388 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 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 [2021-06-05 13:55:47,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:55:47,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:47,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:55:47,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:55:47,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75711453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:47,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:47,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:55:47,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42600393] [2021-06-05 13:55:47,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:47,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:47,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:47,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:47,496 INFO L87 Difference]: Start difference. First operand 179 states and 504 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:55:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:47,601 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-06-05 13:55:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:55:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 16 [2021-06-05 13:55:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:47,603 INFO L225 Difference]: With dead ends: 452 [2021-06-05 13:55:47,603 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 13:55:47,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 13:55:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-06-05 13:55:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-06-05 13:55:47,610 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-06-05 13:55:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:47,610 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-06-05 13:55:47,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:55:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-06-05 13:55:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:55:47,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:47,611 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:47,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 13:55:47,832 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:47,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-06-05 13:55:47,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:47,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967027698] [2021-06-05 13:55:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:47,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:47,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967027698] [2021-06-05 13:55:47,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967027698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:47,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119623948] [2021-06-05 13:55:47,876 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 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 [2021-06-05 13:55:47,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:55:47,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:47,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:55:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:48,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:48,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 13:55:48,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:48,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:48,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:48,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:55:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119623948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:48,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:48,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:55:48,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235816253] [2021-06-05 13:55:48,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:48,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:48,347 INFO L87 Difference]: Start difference. First operand 236 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:55:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:48,455 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-06-05 13:55:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:48,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-05 13:55:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:48,457 INFO L225 Difference]: With dead ends: 318 [2021-06-05 13:55:48,457 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 13:55:48,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 13:55:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-06-05 13:55:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-06-05 13:55:48,463 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-06-05 13:55:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:48,463 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-06-05 13:55:48,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 13:55:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-06-05 13:55:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:55:48,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:48,464 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:48,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 13:55:48,686 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-06-05 13:55:48,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:48,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775139232] [2021-06-05 13:55:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:48,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:48,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775139232] [2021-06-05 13:55:48,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775139232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:48,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951382857] [2021-06-05 13:55:48,736 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 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 [2021-06-05 13:55:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:55:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:48,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:48,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 13:55:49,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:49,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:49,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:49,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:55:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:49,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951382857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:49,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:49,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:55:49,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277831888] [2021-06-05 13:55:49,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:49,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:49,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:49,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:49,080 INFO L87 Difference]: Start difference. First operand 284 states and 776 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:49,209 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-06-05 13:55:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 17 [2021-06-05 13:55:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:49,211 INFO L225 Difference]: With dead ends: 363 [2021-06-05 13:55:49,211 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 13:55:49,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 13:55:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-06-05 13:55:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-06-05 13:55:49,218 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-06-05 13:55:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:49,218 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-06-05 13:55:49,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-06-05 13:55:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:55:49,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:49,219 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:49,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:49,437 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-06-05 13:55:49,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:49,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117854773] [2021-06-05 13:55:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:49,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:49,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117854773] [2021-06-05 13:55:49,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117854773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:49,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825187685] [2021-06-05 13:55:49,475 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 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 [2021-06-05 13:55:49,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:49,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:49,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:55:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:49,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:49,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 13:55:49,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:49,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:49,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:49,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:55:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:49,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825187685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:49,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:49,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:55:49,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672773242] [2021-06-05 13:55:49,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:49,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:49,997 INFO L87 Difference]: Start difference. First operand 326 states and 899 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:50,117 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-06-05 13:55:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:50,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 17 [2021-06-05 13:55:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:50,120 INFO L225 Difference]: With dead ends: 412 [2021-06-05 13:55:50,120 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 13:55:50,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 13:55:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-06-05 13:55:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-06-05 13:55:50,128 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-06-05 13:55:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:50,128 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-06-05 13:55:50,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-06-05 13:55:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:55:50,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:50,129 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:50,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 13:55:50,345 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:50,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-06-05 13:55:50,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:50,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47007436] [2021-06-05 13:55:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:55:50,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47007436] [2021-06-05 13:55:50,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47007436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:50,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128231095] [2021-06-05 13:55:50,393 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 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 [2021-06-05 13:55:50,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:50,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:55:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:50,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:50,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 13:55:50,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:50,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:50,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:50,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:55:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:50,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128231095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:50,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:50,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:55:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74457380] [2021-06-05 13:55:50,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:50,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:50,829 INFO L87 Difference]: Start difference. First operand 370 states and 1035 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:50,975 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-06-05 13:55:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 17 [2021-06-05 13:55:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:50,977 INFO L225 Difference]: With dead ends: 474 [2021-06-05 13:55:50,978 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 13:55:50,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 13:55:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-06-05 13:55:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-06-05 13:55:50,986 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-06-05 13:55:50,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:50,988 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-06-05 13:55:50,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-06-05 13:55:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:55:50,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:50,989 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:51,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:51,212 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-06-05 13:55:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:51,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532722929] [2021-06-05 13:55:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:51,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532722929] [2021-06-05 13:55:51,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532722929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233178118] [2021-06-05 13:55:51,251 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 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 [2021-06-05 13:55:51,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:51,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:55:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:51,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 13:55:51,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:51,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:51,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:51,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:55:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:51,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233178118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:51,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:51,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:55:51,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84619138] [2021-06-05 13:55:51,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:51,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:51,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:51,649 INFO L87 Difference]: Start difference. First operand 421 states and 1197 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:51,781 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-06-05 13:55:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:51,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 17 [2021-06-05 13:55:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:51,783 INFO L225 Difference]: With dead ends: 501 [2021-06-05 13:55:51,783 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 13:55:51,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 13:55:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-06-05 13:55:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-06-05 13:55:51,792 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-06-05 13:55:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:51,793 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-06-05 13:55:51,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-06-05 13:55:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:55:51,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:51,794 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:52,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 13:55:52,009 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-06-05 13:55:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:52,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403346760] [2021-06-05 13:55:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:52,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:52,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403346760] [2021-06-05 13:55:52,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403346760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:52,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927501848] [2021-06-05 13:55:52,058 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 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 [2021-06-05 13:55:52,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:55:52,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:52,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:55:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:52,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:52,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 13:55:52,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:52,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:52,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:52,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:55:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:52,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927501848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:52,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:52,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:55:52,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269638744] [2021-06-05 13:55:52,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:52,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:52,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:52,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:52,549 INFO L87 Difference]: Start difference. First operand 462 states and 1324 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:52,677 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-06-05 13:55:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:52,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 17 [2021-06-05 13:55:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:52,679 INFO L225 Difference]: With dead ends: 537 [2021-06-05 13:55:52,679 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 13:55:52,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 13:55:52,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-06-05 13:55:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-06-05 13:55:52,689 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-06-05 13:55:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:52,689 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-06-05 13:55:52,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:52,689 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-06-05 13:55:52,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:55:52,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:52,690 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:52,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:52,913 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-06-05 13:55:52,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:52,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477224075] [2021-06-05 13:55:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:52,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:52,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477224075] [2021-06-05 13:55:52,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477224075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:52,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494056896] [2021-06-05 13:55:52,964 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 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 [2021-06-05 13:55:53,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:53,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:55:53,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:53,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:53,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 13:55:53,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:53,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:53,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:53,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:55:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:53,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494056896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:53,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:53,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:55:53,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29373454] [2021-06-05 13:55:53,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:53,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:53,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:53,392 INFO L87 Difference]: Start difference. First operand 497 states and 1433 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:53,521 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-06-05 13:55:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 17 [2021-06-05 13:55:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:53,523 INFO L225 Difference]: With dead ends: 574 [2021-06-05 13:55:53,523 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 13:55:53,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 13:55:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-06-05 13:55:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-06-05 13:55:53,539 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-06-05 13:55:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:53,539 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-06-05 13:55:53,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:55:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-06-05 13:55:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:53,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:53,541 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:53,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:53,764 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-06-05 13:55:53,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:53,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368453674] [2021-06-05 13:55:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:53,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:53,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368453674] [2021-06-05 13:55:53,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368453674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:53,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052442470] [2021-06-05 13:55:53,829 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 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 [2021-06-05 13:55:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:53,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052442470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:53,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:53,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:55:53,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101674296] [2021-06-05 13:55:53,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:53,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:53,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:53,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:53,896 INFO L87 Difference]: Start difference. First operand 529 states and 1532 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:55:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:54,099 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-06-05 13:55:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:55:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:55:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:54,102 INFO L225 Difference]: With dead ends: 696 [2021-06-05 13:55:54,103 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 13:55:54,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 13:55:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-06-05 13:55:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-06-05 13:55:54,114 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-06-05 13:55:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:54,114 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-06-05 13:55:54,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:55:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-06-05 13:55:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:54,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:54,116 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:54,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 13:55:54,332 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-06-05 13:55:54,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:54,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171427840] [2021-06-05 13:55:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:54,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:54,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171427840] [2021-06-05 13:55:54,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171427840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:54,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030893517] [2021-06-05 13:55:54,381 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 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 [2021-06-05 13:55:54,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:54,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:54,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:54,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:54,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030893517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:54,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:54,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102023280] [2021-06-05 13:55:54,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:54,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:54,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:54,451 INFO L87 Difference]: Start difference. First operand 549 states and 1593 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:54,499 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-06-05 13:55:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:55:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:55:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:54,502 INFO L225 Difference]: With dead ends: 706 [2021-06-05 13:55:54,502 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 13:55:54,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 13:55:54,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-06-05 13:55:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-06-05 13:55:54,514 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-06-05 13:55:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:54,514 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-06-05 13:55:54,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-06-05 13:55:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:54,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:54,516 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:54,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:54,739 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-06-05 13:55:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:54,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407706382] [2021-06-05 13:55:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:54,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:54,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407706382] [2021-06-05 13:55:54,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407706382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:54,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269943894] [2021-06-05 13:55:54,791 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 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 [2021-06-05 13:55:54,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:55:54,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:54,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:54,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269943894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:54,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:54,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:54,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633217899] [2021-06-05 13:55:54,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:54,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:54,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:54,871 INFO L87 Difference]: Start difference. First operand 525 states and 1513 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:54,985 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-06-05 13:55:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:54,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:55:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:54,988 INFO L225 Difference]: With dead ends: 683 [2021-06-05 13:55:54,988 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 13:55:54,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 13:55:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-06-05 13:55:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-06-05 13:55:55,000 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-06-05 13:55:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:55,000 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-06-05 13:55:55,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-06-05 13:55:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:55,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:55,002 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:55,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 13:55:55,217 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-06-05 13:55:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:55,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397747512] [2021-06-05 13:55:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:55,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:55,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397747512] [2021-06-05 13:55:55,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397747512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:55,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027561217] [2021-06-05 13:55:55,268 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 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 [2021-06-05 13:55:55,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:55,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027561217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:55,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:55,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:55,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166779451] [2021-06-05 13:55:55,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:55,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:55,337 INFO L87 Difference]: Start difference. First operand 547 states and 1581 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:55,390 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-06-05 13:55:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:55:55,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:55:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:55,394 INFO L225 Difference]: With dead ends: 721 [2021-06-05 13:55:55,394 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 13:55:55,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 13:55:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-06-05 13:55:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-06-05 13:55:55,407 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-06-05 13:55:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:55,407 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-06-05 13:55:55,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-06-05 13:55:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:55,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:55,408 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:55,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 13:55:55,631 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:55,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-06-05 13:55:55,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:55,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431142936] [2021-06-05 13:55:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:55,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:55,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431142936] [2021-06-05 13:55:55,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431142936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:55,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265563414] [2021-06-05 13:55:55,683 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 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 [2021-06-05 13:55:55,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:55:55,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:55,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:55,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265563414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:55,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:55,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:55:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858007815] [2021-06-05 13:55:55,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:55,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:55,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:55,760 INFO L87 Difference]: Start difference. First operand 548 states and 1584 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:55,828 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-06-05 13:55:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:55:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:55:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:55,831 INFO L225 Difference]: With dead ends: 777 [2021-06-05 13:55:55,831 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 13:55:55,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 13:55:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-06-05 13:55:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-06-05 13:55:55,840 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-06-05 13:55:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:55,840 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-06-05 13:55:55,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-06-05 13:55:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:55,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:55,841 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:56,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 13:55:56,064 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:56,064 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-06-05 13:55:56,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:56,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52263296] [2021-06-05 13:55:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:56,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:56,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52263296] [2021-06-05 13:55:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52263296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878049338] [2021-06-05 13:55:56,113 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 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 [2021-06-05 13:55:56,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:56,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:56,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878049338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:56,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:56,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:56,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568283371] [2021-06-05 13:55:56,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:56,187 INFO L87 Difference]: Start difference. First operand 523 states and 1501 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:56,304 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-06-05 13:55:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:55:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:56,306 INFO L225 Difference]: With dead ends: 678 [2021-06-05 13:55:56,306 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 13:55:56,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 13:55:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-06-05 13:55:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-06-05 13:55:56,317 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-06-05 13:55:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:56,317 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-06-05 13:55:56,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-06-05 13:55:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:56,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:56,319 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:56,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 13:55:56,533 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-06-05 13:55:56,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:56,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388497037] [2021-06-05 13:55:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:56,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:56,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388497037] [2021-06-05 13:55:56,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388497037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:56,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461899231] [2021-06-05 13:55:56,580 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 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 [2021-06-05 13:55:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:56,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:56,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461899231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:56,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:56,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:56,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572901326] [2021-06-05 13:55:56,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:56,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:56,665 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:56,721 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-06-05 13:55:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:55:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:55:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:56,724 INFO L225 Difference]: With dead ends: 708 [2021-06-05 13:55:56,724 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 13:55:56,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 13:55:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-06-05 13:55:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-06-05 13:55:56,734 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-06-05 13:55:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:56,735 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-06-05 13:55:56,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-06-05 13:55:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:56,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:56,736 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:56,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:56,936 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-06-05 13:55:56,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:56,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639911333] [2021-06-05 13:55:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:56,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:56,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639911333] [2021-06-05 13:55:56,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639911333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:56,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518345186] [2021-06-05 13:55:56,994 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 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 [2021-06-05 13:55:57,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:57,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518345186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:57,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:57,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:55:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222780647] [2021-06-05 13:55:57,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:57,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:57,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:57,069 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:57,150 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-06-05 13:55:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:55:57,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:55:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:57,153 INFO L225 Difference]: With dead ends: 767 [2021-06-05 13:55:57,153 INFO L226 Difference]: Without dead ends: 767 [2021-06-05 13:55:57,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-05 13:55:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-06-05 13:55:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-06-05 13:55:57,164 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-06-05 13:55:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:57,164 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-06-05 13:55:57,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-06-05 13:55:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:57,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:57,165 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:57,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 13:55:57,388 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-06-05 13:55:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:57,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561296507] [2021-06-05 13:55:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:57,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:57,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561296507] [2021-06-05 13:55:57,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561296507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:57,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909019379] [2021-06-05 13:55:57,442 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 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 [2021-06-05 13:55:57,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:57,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:57,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:57,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909019379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:57,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:57,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:55:57,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375036538] [2021-06-05 13:55:57,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:57,511 INFO L87 Difference]: Start difference. First operand 520 states and 1484 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:57,601 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-06-05 13:55:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:55:57,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:55:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:57,604 INFO L225 Difference]: With dead ends: 976 [2021-06-05 13:55:57,604 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 13:55:57,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 13:55:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-06-05 13:55:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-06-05 13:55:57,617 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-06-05 13:55:57,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:57,617 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-06-05 13:55:57,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-06-05 13:55:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:57,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:57,619 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:57,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:57,833 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-06-05 13:55:57,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:57,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981501470] [2021-06-05 13:55:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:57,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:57,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981501470] [2021-06-05 13:55:57,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981501470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:57,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880792223] [2021-06-05 13:55:57,881 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 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 [2021-06-05 13:55:57,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:57,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:57,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:57,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880792223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:57,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:57,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:57,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086809539] [2021-06-05 13:55:57,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:57,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:57,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:57,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:57,945 INFO L87 Difference]: Start difference. First operand 701 states and 2056 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:58,062 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-06-05 13:55:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:55:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:58,065 INFO L225 Difference]: With dead ends: 888 [2021-06-05 13:55:58,065 INFO L226 Difference]: Without dead ends: 886 [2021-06-05 13:55:58,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-06-05 13:55:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-06-05 13:55:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-06-05 13:55:58,079 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-06-05 13:55:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:58,079 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-06-05 13:55:58,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-06-05 13:55:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:58,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:58,081 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:58,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-06-05 13:55:58,297 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-06-05 13:55:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576077539] [2021-06-05 13:55:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:58,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:58,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576077539] [2021-06-05 13:55:58,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576077539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269677596] [2021-06-05 13:55:58,338 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 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 [2021-06-05 13:55:58,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:58,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:55:58,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269677596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:58,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:58,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606763722] [2021-06-05 13:55:58,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:58,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:58,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:58,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:58,400 INFO L87 Difference]: Start difference. First operand 764 states and 2246 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:58,460 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-06-05 13:55:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:55:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:58,464 INFO L225 Difference]: With dead ends: 882 [2021-06-05 13:55:58,464 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 13:55:58,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 13:55:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-06-05 13:55:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-06-05 13:55:58,478 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-06-05 13:55:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:58,478 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-06-05 13:55:58,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:55:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-06-05 13:55:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:58,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:58,480 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:58,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 13:55:58,701 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-06-05 13:55:58,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:58,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044457897] [2021-06-05 13:55:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:58,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:58,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044457897] [2021-06-05 13:55:58,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044457897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609808108] [2021-06-05 13:55:58,757 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 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 [2021-06-05 13:55:58,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:58,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:58,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609808108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:58,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:55:58,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402219633] [2021-06-05 13:55:58,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:58,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:58,829 INFO L87 Difference]: Start difference. First operand 755 states and 2211 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:58,909 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-06-05 13:55:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:55:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:58,912 INFO L225 Difference]: With dead ends: 936 [2021-06-05 13:55:58,912 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 13:55:58,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 13:55:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-06-05 13:55:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-06-05 13:55:58,924 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-06-05 13:55:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:58,925 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-06-05 13:55:58,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-06-05 13:55:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:58,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:58,926 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:59,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:59,145 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-06-05 13:55:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:59,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128435110] [2021-06-05 13:55:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:59,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:59,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128435110] [2021-06-05 13:55:59,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128435110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:59,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230441247] [2021-06-05 13:55:59,193 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 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 [2021-06-05 13:55:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:59,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:59,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230441247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:59,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:59,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:55:59,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052975728] [2021-06-05 13:55:59,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:59,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:59,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:59,261 INFO L87 Difference]: Start difference. First operand 710 states and 2066 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:59,332 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-06-05 13:55:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:55:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:59,335 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 13:55:59,335 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 13:55:59,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 13:55:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-06-05 13:55:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-06-05 13:55:59,348 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-06-05 13:55:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:59,348 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-06-05 13:55:59,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-06-05 13:55:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:59,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:59,350 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:59,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 13:55:59,572 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-06-05 13:55:59,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:59,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317047169] [2021-06-05 13:55:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:59,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:59,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317047169] [2021-06-05 13:55:59,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317047169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:59,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471961275] [2021-06-05 13:55:59,624 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 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 [2021-06-05 13:55:59,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:59,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:59,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:55:59,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:59,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471961275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:59,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:59,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:55:59,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326064762] [2021-06-05 13:55:59,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:59,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:59,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:59,686 INFO L87 Difference]: Start difference. First operand 950 states and 2822 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:59,808 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-06-05 13:55:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:55:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:59,811 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 13:55:59,811 INFO L226 Difference]: Without dead ends: 1384 [2021-06-05 13:55:59,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-05 13:55:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-06-05 13:55:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-06-05 13:55:59,825 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-06-05 13:55:59,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:59,825 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-06-05 13:55:59,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:55:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-06-05 13:55:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:55:59,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:59,826 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:00,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:00,027 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:00,027 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-06-05 13:56:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:00,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341515759] [2021-06-05 13:56:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:00,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341515759] [2021-06-05 13:56:00,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341515759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644634591] [2021-06-05 13:56:00,068 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 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 [2021-06-05 13:56:00,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:56:00,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644634591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:00,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:00,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:56:00,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629798388] [2021-06-05 13:56:00,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:00,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:00,131 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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) [2021-06-05 13:56:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:00,234 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-06-05 13:56:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 18 [2021-06-05 13:56:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:00,237 INFO L225 Difference]: With dead ends: 1540 [2021-06-05 13:56:00,237 INFO L226 Difference]: Without dead ends: 1536 [2021-06-05 13:56:00,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-05 13:56:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-06-05 13:56:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-06-05 13:56:00,260 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-06-05 13:56:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:00,261 INFO L482 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-06-05 13:56:00,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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) [2021-06-05 13:56:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-06-05 13:56:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:00,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:00,263 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:00,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 13:56:00,481 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-06-05 13:56:00,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:00,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299211928] [2021-06-05 13:56:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:00,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299211928] [2021-06-05 13:56:00,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299211928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539150588] [2021-06-05 13:56:00,532 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 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 [2021-06-05 13:56:00,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:00,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:00,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:00,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539150588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:00,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:00,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:56:00,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400464057] [2021-06-05 13:56:00,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:56:00,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:00,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:56:00,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:00,594 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-06-05 13:56:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:00,685 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-06-05 13:56:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:00,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 18 [2021-06-05 13:56:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:00,688 INFO L225 Difference]: With dead ends: 1886 [2021-06-05 13:56:00,688 INFO L226 Difference]: Without dead ends: 1886 [2021-06-05 13:56:00,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-06-05 13:56:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-06-05 13:56:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-06-05 13:56:00,714 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-06-05 13:56:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:00,714 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-06-05 13:56:00,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-06-05 13:56:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-06-05 13:56:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:00,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:00,717 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:00,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:00,933 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-06-05 13:56:00,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:00,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359004919] [2021-06-05 13:56:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:00,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:00,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359004919] [2021-06-05 13:56:00,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359004919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18929645] [2021-06-05 13:56:00,988 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 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 [2021-06-05 13:56:01,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:01,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:01,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:01,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:01,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18929645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:01,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:01,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:56:01,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850713440] [2021-06-05 13:56:01,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:01,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:01,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:01,055 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:01,156 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-06-05 13:56:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:56:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:01,160 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 13:56:01,160 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 13:56:01,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 13:56:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-06-05 13:56:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-06-05 13:56:01,183 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-06-05 13:56:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:01,183 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-06-05 13:56:01,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-06-05 13:56:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:01,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:01,185 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:01,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 13:56:01,406 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-06-05 13:56:01,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:01,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060033516] [2021-06-05 13:56:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:01,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060033516] [2021-06-05 13:56:01,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060033516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039299811] [2021-06-05 13:56:01,464 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 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 [2021-06-05 13:56:01,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:56:01,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039299811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:01,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:01,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:56:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836313937] [2021-06-05 13:56:01,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:01,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:01,533 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:01,680 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-06-05 13:56:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:56:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:01,686 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 13:56:01,686 INFO L226 Difference]: Without dead ends: 1469 [2021-06-05 13:56:01,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-05 13:56:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-06-05 13:56:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-06-05 13:56:01,707 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-06-05 13:56:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:01,707 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-06-05 13:56:01,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-06-05 13:56:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:01,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:01,709 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:01,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:01,932 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:01,932 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-06-05 13:56:01,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:01,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627191711] [2021-06-05 13:56:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:01,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627191711] [2021-06-05 13:56:01,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627191711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379102806] [2021-06-05 13:56:01,975 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 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 [2021-06-05 13:56:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:02,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:02,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379102806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:02,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:02,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:56:02,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611772222] [2021-06-05 13:56:02,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:56:02,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:56:02,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:02,044 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:02,142 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-06-05 13:56:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:02,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:56:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:02,144 INFO L225 Difference]: With dead ends: 1280 [2021-06-05 13:56:02,144 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 13:56:02,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 13:56:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-06-05 13:56:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-06-05 13:56:02,159 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-06-05 13:56:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:02,159 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-06-05 13:56:02,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-06-05 13:56:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:02,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:02,161 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:02,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 13:56:02,376 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-06-05 13:56:02,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:02,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443241928] [2021-06-05 13:56:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:02,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443241928] [2021-06-05 13:56:02,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443241928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157102415] [2021-06-05 13:56:02,430 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 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 [2021-06-05 13:56:02,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:02,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157102415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:02,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:02,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:56:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388702602] [2021-06-05 13:56:02,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:56:02,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:02,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:56:02,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:02,519 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:02,580 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-06-05 13:56:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:02,581 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:56:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:02,588 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 13:56:02,588 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 13:56:02,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 13:56:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-06-05 13:56:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-06-05 13:56:02,607 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-06-05 13:56:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:02,607 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-06-05 13:56:02,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-06-05 13:56:02,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:02,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:02,609 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:02,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:02,833 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-06-05 13:56:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:02,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160220048] [2021-06-05 13:56:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:02,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:02,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160220048] [2021-06-05 13:56:02,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160220048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:02,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969736982] [2021-06-05 13:56:02,882 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 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 [2021-06-05 13:56:02,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:02,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:02,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969736982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:02,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:02,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:56:02,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683755079] [2021-06-05 13:56:02,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:02,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:02,957 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:03,021 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-06-05 13:56:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:56:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:56:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:03,023 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 13:56:03,023 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 13:56:03,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 13:56:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-06-05 13:56:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-06-05 13:56:03,040 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-06-05 13:56:03,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:03,040 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-06-05 13:56:03,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-06-05 13:56:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:03,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:03,042 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:03,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:03,264 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-06-05 13:56:03,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:03,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774711835] [2021-06-05 13:56:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:03,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:03,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774711835] [2021-06-05 13:56:03,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774711835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923314955] [2021-06-05 13:56:03,331 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 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 [2021-06-05 13:56:03,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:03,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:03,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:03,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923314955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:03,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:03,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24823612] [2021-06-05 13:56:03,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:03,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:03,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:03,396 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:03,495 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-06-05 13:56:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:56:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:03,498 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 13:56:03,498 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 13:56:03,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 13:56:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-06-05 13:56:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-06-05 13:56:03,517 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-06-05 13:56:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:03,517 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-06-05 13:56:03,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-06-05 13:56:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:03,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:03,519 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:03,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 13:56:03,733 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:03,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-06-05 13:56:03,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:03,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029839064] [2021-06-05 13:56:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:03,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:03,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029839064] [2021-06-05 13:56:03,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029839064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17714923] [2021-06-05 13:56:03,786 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 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 [2021-06-05 13:56:03,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:03,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17714923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:03,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:03,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982386092] [2021-06-05 13:56:03,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:03,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:03,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:03,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:03,861 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:03,968 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-06-05 13:56:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:03,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:03,971 INFO L225 Difference]: With dead ends: 1385 [2021-06-05 13:56:03,971 INFO L226 Difference]: Without dead ends: 1385 [2021-06-05 13:56:03,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-05 13:56:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-06-05 13:56:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-06-05 13:56:03,987 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-06-05 13:56:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:03,987 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-06-05 13:56:03,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-06-05 13:56:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:03,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:03,988 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:04,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 13:56:04,209 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-06-05 13:56:04,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:04,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639445440] [2021-06-05 13:56:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:04,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639445440] [2021-06-05 13:56:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639445440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903945284] [2021-06-05 13:56:04,265 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 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 [2021-06-05 13:56:04,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:56:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:04,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903945284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:04,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:04,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821321044] [2021-06-05 13:56:04,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:04,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:04,342 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:04,547 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-06-05 13:56:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:04,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:04,551 INFO L225 Difference]: With dead ends: 1491 [2021-06-05 13:56:04,551 INFO L226 Difference]: Without dead ends: 1491 [2021-06-05 13:56:04,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:56:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-05 13:56:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-06-05 13:56:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-06-05 13:56:04,571 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-06-05 13:56:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:04,571 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-06-05 13:56:04,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-06-05 13:56:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:04,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:04,573 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:04,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:04,796 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:04,796 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-06-05 13:56:04,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:04,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031929577] [2021-06-05 13:56:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:04,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:04,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031929577] [2021-06-05 13:56:04,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031929577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140797224] [2021-06-05 13:56:04,843 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 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 [2021-06-05 13:56:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:04,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140797224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:04,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:56:04,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447198676] [2021-06-05 13:56:04,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:56:04,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:04,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:56:04,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:04,906 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-06-05 13:56:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:05,040 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-06-05 13:56:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 18 [2021-06-05 13:56:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:05,043 INFO L225 Difference]: With dead ends: 1466 [2021-06-05 13:56:05,043 INFO L226 Difference]: Without dead ends: 1462 [2021-06-05 13:56:05,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-05 13:56:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-06-05 13:56:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-06-05 13:56:05,062 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-06-05 13:56:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:05,062 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-06-05 13:56:05,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-06-05 13:56:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-06-05 13:56:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:05,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:05,064 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:05,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 13:56:05,287 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:05,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-06-05 13:56:05,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:05,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829181690] [2021-06-05 13:56:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:05,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:05,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829181690] [2021-06-05 13:56:05,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829181690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825995218] [2021-06-05 13:56:05,333 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 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 [2021-06-05 13:56:05,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:05,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825995218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:05,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:56:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501152460] [2021-06-05 13:56:05,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:05,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:05,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:05,397 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:05,539 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-06-05 13:56:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:05,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:56:05,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:05,542 INFO L225 Difference]: With dead ends: 1717 [2021-06-05 13:56:05,542 INFO L226 Difference]: Without dead ends: 1717 [2021-06-05 13:56:05,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-06-05 13:56:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-06-05 13:56:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-06-05 13:56:05,566 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-06-05 13:56:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:05,566 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-06-05 13:56:05,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-06-05 13:56:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:05,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:05,568 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:05,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 13:56:05,785 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-06-05 13:56:05,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:05,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170038415] [2021-06-05 13:56:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:05,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:05,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170038415] [2021-06-05 13:56:05,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170038415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771172956] [2021-06-05 13:56:05,839 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 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 [2021-06-05 13:56:05,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771172956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:05,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:05,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519896059] [2021-06-05 13:56:05,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:05,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:05,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:05,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:05,916 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:06,056 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-06-05 13:56:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:06,058 INFO L225 Difference]: With dead ends: 1815 [2021-06-05 13:56:06,059 INFO L226 Difference]: Without dead ends: 1815 [2021-06-05 13:56:06,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-06-05 13:56:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-06-05 13:56:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-06-05 13:56:06,080 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-06-05 13:56:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:06,080 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-06-05 13:56:06,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-06-05 13:56:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:06,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:06,082 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:06,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 13:56:06,285 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-06-05 13:56:06,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:06,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023843792] [2021-06-05 13:56:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:06,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023843792] [2021-06-05 13:56:06,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023843792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852623452] [2021-06-05 13:56:06,343 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 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 [2021-06-05 13:56:06,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:06,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:06,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:06,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852623452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:06,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:06,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740127405] [2021-06-05 13:56:06,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:06,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:06,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:06,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:06,417 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:06,577 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-06-05 13:56:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:06,579 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 13:56:06,579 INFO L226 Difference]: Without dead ends: 1539 [2021-06-05 13:56:06,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:56:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-06-05 13:56:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-06-05 13:56:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-06-05 13:56:06,597 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-06-05 13:56:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:06,597 INFO L482 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-06-05 13:56:06,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-06-05 13:56:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:06,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:06,599 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:06,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 13:56:06,813 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-06-05 13:56:06,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:06,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267657420] [2021-06-05 13:56:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:06,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:06,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267657420] [2021-06-05 13:56:06,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267657420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546160298] [2021-06-05 13:56:06,860 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 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 [2021-06-05 13:56:06,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:06,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:06,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546160298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:06,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:56:06,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817333390] [2021-06-05 13:56:06,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:56:06,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:06,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:56:06,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:06,918 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:07,033 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-06-05 13:56:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:56:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:07,035 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 13:56:07,035 INFO L226 Difference]: Without dead ends: 1315 [2021-06-05 13:56:07,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-05 13:56:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-06-05 13:56:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-06-05 13:56:07,053 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-06-05 13:56:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:07,053 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-06-05 13:56:07,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-06-05 13:56:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:07,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:07,055 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:07,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 13:56:07,278 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:07,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-06-05 13:56:07,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:07,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926591906] [2021-06-05 13:56:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:07,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:07,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926591906] [2021-06-05 13:56:07,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926591906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501751213] [2021-06-05 13:56:07,326 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 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 [2021-06-05 13:56:07,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:07,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:07,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501751213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:07,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:56:07,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565142380] [2021-06-05 13:56:07,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:56:07,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:56:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:07,390 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:07,448 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-06-05 13:56:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 18 [2021-06-05 13:56:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:07,450 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 13:56:07,450 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 13:56:07,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 13:56:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-06-05 13:56:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-06-05 13:56:07,470 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-06-05 13:56:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:07,470 INFO L482 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-06-05 13:56:07,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-06-05 13:56:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:07,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:07,472 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:07,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:07,693 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-06-05 13:56:07,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:07,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862801165] [2021-06-05 13:56:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:07,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:07,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862801165] [2021-06-05 13:56:07,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862801165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704007346] [2021-06-05 13:56:07,740 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 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 [2021-06-05 13:56:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:07,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704007346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:07,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:56:07,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162056923] [2021-06-05 13:56:07,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:07,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:07,808 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:07,877 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-06-05 13:56:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:56:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:07,878 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 13:56:07,878 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 13:56:07,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 13:56:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-06-05 13:56:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-06-05 13:56:07,894 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-06-05 13:56:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:07,894 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-06-05 13:56:07,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-06-05 13:56:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:07,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:07,895 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:08,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:08,118 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-06-05 13:56:08,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:08,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663404944] [2021-06-05 13:56:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:08,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:08,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663404944] [2021-06-05 13:56:08,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663404944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925214277] [2021-06-05 13:56:08,164 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 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 [2021-06-05 13:56:08,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:08,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:08,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:08,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925214277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:08,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:56:08,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126573040] [2021-06-05 13:56:08,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:08,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:08,239 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:08,293 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-06-05 13:56:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:56:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 13:56:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:08,298 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 13:56:08,298 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 13:56:08,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 13:56:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-06-05 13:56:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-06-05 13:56:08,315 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-06-05 13:56:08,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:08,315 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-06-05 13:56:08,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:08,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-06-05 13:56:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:08,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:08,317 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:08,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:08,532 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-06-05 13:56:08,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:08,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852120212] [2021-06-05 13:56:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:08,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:08,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852120212] [2021-06-05 13:56:08,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852120212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181335996] [2021-06-05 13:56:08,591 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 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 [2021-06-05 13:56:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:08,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181335996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:08,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:08,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453921802] [2021-06-05 13:56:08,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:08,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:08,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:08,689 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:08,786 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-06-05 13:56:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:56:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:08,788 INFO L225 Difference]: With dead ends: 1693 [2021-06-05 13:56:08,788 INFO L226 Difference]: Without dead ends: 1693 [2021-06-05 13:56:08,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-06-05 13:56:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-06-05 13:56:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-06-05 13:56:08,805 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-06-05 13:56:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:08,805 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-06-05 13:56:08,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-06-05 13:56:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:08,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:08,807 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:09,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:09,007 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-06-05 13:56:09,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:09,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636477856] [2021-06-05 13:56:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:09,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636477856] [2021-06-05 13:56:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636477856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519559903] [2021-06-05 13:56:09,079 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 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 [2021-06-05 13:56:09,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:09,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519559903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:09,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:09,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822799277] [2021-06-05 13:56:09,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:09,139 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:09,271 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-06-05 13:56:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:09,273 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 13:56:09,273 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 13:56:09,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 13:56:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-06-05 13:56:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-06-05 13:56:09,289 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-06-05 13:56:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:09,289 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-06-05 13:56:09,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-06-05 13:56:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:09,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:09,291 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:09,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 13:56:09,491 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-06-05 13:56:09,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:09,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746335067] [2021-06-05 13:56:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:09,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:09,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746335067] [2021-06-05 13:56:09,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746335067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351440121] [2021-06-05 13:56:09,549 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 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 [2021-06-05 13:56:09,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:09,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:09,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:09,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:09,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351440121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:09,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:56:09,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577780780] [2021-06-05 13:56:09,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:09,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:09,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:09,630 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:09,842 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-06-05 13:56:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:56:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 13:56:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:09,844 INFO L225 Difference]: With dead ends: 1973 [2021-06-05 13:56:09,844 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 13:56:09,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:56:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 13:56:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-06-05 13:56:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-06-05 13:56:09,862 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-06-05 13:56:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:09,862 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-06-05 13:56:09,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2021-06-05 13:56:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-06-05 13:56:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:09,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:09,864 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:10,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 13:56:10,065 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-06-05 13:56:10,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:10,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411499538] [2021-06-05 13:56:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:10,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411499538] [2021-06-05 13:56:10,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411499538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487953183] [2021-06-05 13:56:10,133 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 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 [2021-06-05 13:56:10,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:10,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:10,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487953183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:10,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-06-05 13:56:10,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804457050] [2021-06-05 13:56:10,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:10,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:10,219 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 13:56:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:10,404 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-06-05 13:56:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:56:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 18 [2021-06-05 13:56:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:10,406 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 13:56:10,406 INFO L226 Difference]: Without dead ends: 1830 [2021-06-05 13:56:10,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-06-05 13:56:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-06-05 13:56:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-06-05 13:56:10,431 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-06-05 13:56:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:10,431 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-06-05 13:56:10,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 13:56:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-06-05 13:56:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:10,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:10,433 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:10,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:10,633 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:10,634 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-06-05 13:56:10,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:10,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708557832] [2021-06-05 13:56:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:10,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:10,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708557832] [2021-06-05 13:56:10,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708557832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676240302] [2021-06-05 13:56:10,700 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 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 [2021-06-05 13:56:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:10,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676240302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:10,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 13:56:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088825256] [2021-06-05 13:56:10,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:10,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:10,780 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:11,112 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-06-05 13:56:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:56:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 18 [2021-06-05 13:56:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:11,117 INFO L225 Difference]: With dead ends: 2513 [2021-06-05 13:56:11,117 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 13:56:11,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:56:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 13:56:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-06-05 13:56:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-06-05 13:56:11,150 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-06-05 13:56:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:11,151 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-06-05 13:56:11,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-06-05 13:56:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:11,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:11,154 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:11,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 13:56:11,369 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-06-05 13:56:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925524297] [2021-06-05 13:56:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:11,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925524297] [2021-06-05 13:56:11,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925524297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828087174] [2021-06-05 13:56:11,436 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 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 [2021-06-05 13:56:11,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:11,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:11,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828087174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:11,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:11,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 13:56:11,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130383065] [2021-06-05 13:56:11,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:11,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:11,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:11,522 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:11,750 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-06-05 13:56:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:56:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 18 [2021-06-05 13:56:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:11,759 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 13:56:11,759 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 13:56:11,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:56:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 13:56:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-06-05 13:56:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-06-05 13:56:11,779 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-06-05 13:56:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:11,779 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-06-05 13:56:11,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-06-05 13:56:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:11,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:11,781 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:11,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:11,981 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:11,982 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-06-05 13:56:11,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:11,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428412018] [2021-06-05 13:56:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:12,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:12,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428412018] [2021-06-05 13:56:12,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428412018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103966471] [2021-06-05 13:56:12,049 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 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 [2021-06-05 13:56:12,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:12,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103966471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 13:56:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631580332] [2021-06-05 13:56:12,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:12,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:12,137 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:12,354 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-06-05 13:56:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:56:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 18 [2021-06-05 13:56:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:12,356 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 13:56:12,356 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 13:56:12,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:56:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 13:56:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-06-05 13:56:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-06-05 13:56:12,375 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-06-05 13:56:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:12,375 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-06-05 13:56:12,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-06-05 13:56:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:12,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:12,377 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:12,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 13:56:12,578 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-06-05 13:56:12,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:12,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138058355] [2021-06-05 13:56:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:12,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:12,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138058355] [2021-06-05 13:56:12,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138058355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183594424] [2021-06-05 13:56:12,654 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 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 [2021-06-05 13:56:12,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:12,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:12,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183594424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:12,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 13:56:12,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847317289] [2021-06-05 13:56:12,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:12,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:12,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:12,731 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-05 13:56:12,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:12,855 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-06-05 13:56:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:12,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 [2021-06-05 13:56:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:12,858 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 13:56:12,858 INFO L226 Difference]: Without dead ends: 2023 [2021-06-05 13:56:12,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-06-05 13:56:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-06-05 13:56:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-06-05 13:56:12,878 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-06-05 13:56:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:12,879 INFO L482 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-06-05 13:56:12,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-05 13:56:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-06-05 13:56:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:12,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:12,893 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:13,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 13:56:13,094 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-06-05 13:56:13,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:13,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022420143] [2021-06-05 13:56:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:13,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:13,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022420143] [2021-06-05 13:56:13,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022420143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:13,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274203632] [2021-06-05 13:56:13,164 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 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 [2021-06-05 13:56:13,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:56:13,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:13,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:13,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274203632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:13,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:13,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 13:56:13,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177072553] [2021-06-05 13:56:13,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:13,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:13,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:13,232 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-05 13:56:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:13,342 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-06-05 13:56:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 [2021-06-05 13:56:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:13,345 INFO L225 Difference]: With dead ends: 2077 [2021-06-05 13:56:13,345 INFO L226 Difference]: Without dead ends: 2077 [2021-06-05 13:56:13,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-06-05 13:56:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-06-05 13:56:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-06-05 13:56:13,367 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-06-05 13:56:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:13,367 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-06-05 13:56:13,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-05 13:56:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-06-05 13:56:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:13,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:13,369 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:13,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 13:56:13,570 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-06-05 13:56:13,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:13,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138121943] [2021-06-05 13:56:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:13,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:13,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138121943] [2021-06-05 13:56:13,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138121943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:13,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179369565] [2021-06-05 13:56:13,632 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 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 [2021-06-05 13:56:13,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:13,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:13,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179369565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:13,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:13,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 13:56:13,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393615969] [2021-06-05 13:56:13,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:13,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:13,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:13,707 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 13:56:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:13,853 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-06-05 13:56:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 18 [2021-06-05 13:56:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:13,855 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 13:56:13,856 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 13:56:13,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 13:56:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-06-05 13:56:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-06-05 13:56:13,876 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-06-05 13:56:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:13,876 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-06-05 13:56:13,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 13:56:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-06-05 13:56:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:13,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:13,878 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:14,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:14,078 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-06-05 13:56:14,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:14,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443674261] [2021-06-05 13:56:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:14,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:14,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443674261] [2021-06-05 13:56:14,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443674261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:14,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150025019] [2021-06-05 13:56:14,135 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 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 [2021-06-05 13:56:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:14,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150025019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:14,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:14,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 13:56:14,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309620428] [2021-06-05 13:56:14,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:14,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:14,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:14,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:14,216 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 13:56:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:14,361 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-06-05 13:56:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:14,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 18 [2021-06-05 13:56:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:14,364 INFO L225 Difference]: With dead ends: 2505 [2021-06-05 13:56:14,364 INFO L226 Difference]: Without dead ends: 2505 [2021-06-05 13:56:14,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-06-05 13:56:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-06-05 13:56:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-06-05 13:56:14,390 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-06-05 13:56:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:14,390 INFO L482 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-06-05 13:56:14,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 13:56:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-06-05 13:56:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:14,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:14,393 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:14,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:14,605 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-06-05 13:56:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:14,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681956364] [2021-06-05 13:56:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:14,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:14,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681956364] [2021-06-05 13:56:14,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681956364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:14,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652347732] [2021-06-05 13:56:14,670 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 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 [2021-06-05 13:56:14,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:14,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:14,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:14,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:14,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652347732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:14,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:14,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 13:56:14,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844918097] [2021-06-05 13:56:14,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:14,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:14,762 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 13:56:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:14,928 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-06-05 13:56:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 18 [2021-06-05 13:56:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:14,932 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 13:56:14,932 INFO L226 Difference]: Without dead ends: 2489 [2021-06-05 13:56:14,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-06-05 13:56:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-06-05 13:56:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-06-05 13:56:14,977 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-06-05 13:56:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:14,977 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-06-05 13:56:14,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 13:56:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-06-05 13:56:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:14,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:14,981 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:15,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:15,197 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-06-05 13:56:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361189636] [2021-06-05 13:56:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:15,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361189636] [2021-06-05 13:56:15,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361189636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090604375] [2021-06-05 13:56:15,266 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 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 [2021-06-05 13:56:15,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:15,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:15,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090604375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:15,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 13:56:15,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095552406] [2021-06-05 13:56:15,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:15,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:15,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:15,364 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 13:56:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:15,584 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-06-05 13:56:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 [2021-06-05 13:56:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:15,587 INFO L225 Difference]: With dead ends: 2555 [2021-06-05 13:56:15,587 INFO L226 Difference]: Without dead ends: 2555 [2021-06-05 13:56:15,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:56:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-05 13:56:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-06-05 13:56:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-06-05 13:56:15,615 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-06-05 13:56:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:15,616 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-06-05 13:56:15,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 13:56:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-06-05 13:56:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:15,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:15,618 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:15,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:15,818 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:15,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-06-05 13:56:15,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:15,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12621598] [2021-06-05 13:56:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:15,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:15,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12621598] [2021-06-05 13:56:15,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12621598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424305133] [2021-06-05 13:56:15,885 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 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 [2021-06-05 13:56:15,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:15,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424305133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:15,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 13:56:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845107073] [2021-06-05 13:56:15,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:15,986 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 13:56:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:16,196 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-06-05 13:56:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 [2021-06-05 13:56:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:16,200 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 13:56:16,200 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 13:56:16,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 13:56:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-06-05 13:56:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-06-05 13:56:16,237 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-06-05 13:56:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:16,237 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-06-05 13:56:16,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 13:56:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-06-05 13:56:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:56:16,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:16,240 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:16,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:16,463 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-06-05 13:56:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:16,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802423775] [2021-06-05 13:56:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:16,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802423775] [2021-06-05 13:56:16,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802423775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:16,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365776480] [2021-06-05 13:56:16,534 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 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 [2021-06-05 13:56:16,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:16,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365776480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:16,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:16,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 13:56:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001957395] [2021-06-05 13:56:16,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:16,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:16,616 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 13:56:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:16,886 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-06-05 13:56:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:56:16,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 18 [2021-06-05 13:56:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:16,889 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 13:56:16,889 INFO L226 Difference]: Without dead ends: 2926 [2021-06-05 13:56:16,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:56:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-05 13:56:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-06-05 13:56:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-06-05 13:56:16,914 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-06-05 13:56:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:16,914 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-06-05 13:56:16,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 13:56:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-06-05 13:56:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:16,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:16,916 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:17,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 13:56:17,117 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-06-05 13:56:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488082447] [2021-06-05 13:56:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:17,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488082447] [2021-06-05 13:56:17,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488082447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551943429] [2021-06-05 13:56:17,199 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 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 [2021-06-05 13:56:17,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:17,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551943429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:17,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 13:56:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761514301] [2021-06-05 13:56:17,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:17,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:17,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:17,285 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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) [2021-06-05 13:56:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:17,446 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-06-05 13:56:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 [2021-06-05 13:56:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:17,448 INFO L225 Difference]: With dead ends: 2653 [2021-06-05 13:56:17,449 INFO L226 Difference]: Without dead ends: 2647 [2021-06-05 13:56:17,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:56:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-06-05 13:56:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-06-05 13:56:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-06-05 13:56:17,474 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-06-05 13:56:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:17,474 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-06-05 13:56:17,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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) [2021-06-05 13:56:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-06-05 13:56:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:17,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:17,476 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:17,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 13:56:17,678 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-06-05 13:56:17,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:17,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611413739] [2021-06-05 13:56:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:17,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611413739] [2021-06-05 13:56:17,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611413739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667725573] [2021-06-05 13:56:17,747 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 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 [2021-06-05 13:56:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:17,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667725573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:17,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 13:56:17,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710157495] [2021-06-05 13:56:17,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:17,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:17,823 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:17,967 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-06-05 13:56:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-06-05 13:56:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:17,971 INFO L225 Difference]: With dead ends: 2499 [2021-06-05 13:56:17,971 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 13:56:17,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:17,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 13:56:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-06-05 13:56:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-06-05 13:56:18,010 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-06-05 13:56:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:18,010 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-06-05 13:56:18,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-06-05 13:56:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:18,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:18,013 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:18,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:18,237 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-06-05 13:56:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:18,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206157035] [2021-06-05 13:56:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:56:18,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:18,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206157035] [2021-06-05 13:56:18,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206157035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956010191] [2021-06-05 13:56:18,288 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 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 [2021-06-05 13:56:18,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:18,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:18,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956010191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:18,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:56:18,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267659365] [2021-06-05 13:56:18,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:18,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:18,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:18,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:18,359 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-06-05 13:56:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:18,457 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-06-05 13:56:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:18,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20 [2021-06-05 13:56:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:18,461 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 13:56:18,461 INFO L226 Difference]: Without dead ends: 2670 [2021-06-05 13:56:18,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-06-05 13:56:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-06-05 13:56:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-06-05 13:56:18,499 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-06-05 13:56:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:18,499 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-06-05 13:56:18,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-06-05 13:56:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-06-05 13:56:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:18,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:18,502 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:18,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 13:56:18,726 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-06-05 13:56:18,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:18,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431908449] [2021-06-05 13:56:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:18,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:18,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431908449] [2021-06-05 13:56:18,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431908449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119133877] [2021-06-05 13:56:18,788 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 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 [2021-06-05 13:56:18,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:56:18,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:18,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119133877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:18,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:18,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497984888] [2021-06-05 13:56:18,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:18,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:18,846 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 13:56:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:19,033 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-06-05 13:56:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:19,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 13:56:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:19,037 INFO L225 Difference]: With dead ends: 2616 [2021-06-05 13:56:19,037 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 13:56:19,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 13:56:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-06-05 13:56:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-06-05 13:56:19,089 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-06-05 13:56:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:19,090 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-06-05 13:56:19,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 13:56:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-06-05 13:56:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:19,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:19,093 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:19,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:19,313 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-06-05 13:56:19,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:19,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053959732] [2021-06-05 13:56:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:19,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:19,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053959732] [2021-06-05 13:56:19,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053959732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430694070] [2021-06-05 13:56:19,379 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 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 [2021-06-05 13:56:19,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:19,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430694070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:19,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 13:56:19,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141120508] [2021-06-05 13:56:19,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:19,455 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:19,604 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-06-05 13:56:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:19,607 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 13:56:19,607 INFO L226 Difference]: Without dead ends: 2531 [2021-06-05 13:56:19,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-06-05 13:56:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-06-05 13:56:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-06-05 13:56:19,629 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-06-05 13:56:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:19,630 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-06-05 13:56:19,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-06-05 13:56:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:19,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:19,631 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:19,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 13:56:19,832 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:19,832 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-06-05 13:56:19,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:19,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720420760] [2021-06-05 13:56:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:56:19,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720420760] [2021-06-05 13:56:19,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720420760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035371011] [2021-06-05 13:56:19,875 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 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 [2021-06-05 13:56:19,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:56:19,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:19,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:19,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035371011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:19,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:56:19,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209753824] [2021-06-05 13:56:19,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:19,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:19,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:19,948 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-06-05 13:56:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:20,025 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-06-05 13:56:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:20,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20 [2021-06-05 13:56:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:20,028 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 13:56:20,028 INFO L226 Difference]: Without dead ends: 2644 [2021-06-05 13:56:20,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-06-05 13:56:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-06-05 13:56:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-06-05 13:56:20,050 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-06-05 13:56:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:20,050 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-06-05 13:56:20,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-06-05 13:56:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-06-05 13:56:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:20,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:20,052 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:20,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:20,252 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-06-05 13:56:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:20,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016001166] [2021-06-05 13:56:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:20,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016001166] [2021-06-05 13:56:20,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016001166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323779833] [2021-06-05 13:56:20,332 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 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 [2021-06-05 13:56:20,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:56:20,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:20,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323779833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:20,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 13:56:20,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921701649] [2021-06-05 13:56:20,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:20,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:20,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:20,401 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:20,562 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-06-05 13:56:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-06-05 13:56:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:20,566 INFO L225 Difference]: With dead ends: 2573 [2021-06-05 13:56:20,566 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 13:56:20,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 13:56:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-06-05 13:56:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-06-05 13:56:20,606 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-06-05 13:56:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:20,606 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-06-05 13:56:20,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-06-05 13:56:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:20,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:20,609 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:20,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:20,829 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-06-05 13:56:20,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:20,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877654676] [2021-06-05 13:56:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:20,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877654676] [2021-06-05 13:56:20,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877654676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887946859] [2021-06-05 13:56:20,898 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 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 [2021-06-05 13:56:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:20,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:20,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:20,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887946859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:20,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 13:56:20,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314032968] [2021-06-05 13:56:20,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:20,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:20,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:20,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:20,969 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:21,106 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-06-05 13:56:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:21,108 INFO L225 Difference]: With dead ends: 2568 [2021-06-05 13:56:21,108 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 13:56:21,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 13:56:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-06-05 13:56:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-06-05 13:56:21,142 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-06-05 13:56:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:21,142 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-06-05 13:56:21,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-06-05 13:56:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:21,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:21,145 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:21,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:21,362 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-06-05 13:56:21,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:21,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806939285] [2021-06-05 13:56:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:21,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:21,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806939285] [2021-06-05 13:56:21,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806939285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591026955] [2021-06-05 13:56:21,420 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 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 [2021-06-05 13:56:21,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:21,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:21,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591026955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:21,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 13:56:21,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655185305] [2021-06-05 13:56:21,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:21,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:21,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:21,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:21,479 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:21,583 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-06-05 13:56:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:21,585 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 13:56:21,585 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 13:56:21,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 13:56:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-06-05 13:56:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-06-05 13:56:21,616 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-06-05 13:56:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:21,617 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-06-05 13:56:21,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-06-05 13:56:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:21,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:21,618 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:21,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-05 13:56:21,819 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:21,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-06-05 13:56:21,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:21,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516189051] [2021-06-05 13:56:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:56:21,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:21,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516189051] [2021-06-05 13:56:21,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516189051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370903142] [2021-06-05 13:56:21,861 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 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 [2021-06-05 13:56:21,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:21,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:21,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:21,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:21,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370903142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:21,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:56:21,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829395958] [2021-06-05 13:56:21,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:56:21,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:56:21,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:21,929 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:21,981 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-06-05 13:56:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:56:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 20 [2021-06-05 13:56:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:21,983 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 13:56:21,983 INFO L226 Difference]: Without dead ends: 2581 [2021-06-05 13:56:21,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-06-05 13:56:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-06-05 13:56:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-06-05 13:56:22,006 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-06-05 13:56:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:22,006 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-06-05 13:56:22,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-06-05 13:56:22,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-06-05 13:56:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:22,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:22,007 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:22,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 13:56:22,208 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:22,208 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-06-05 13:56:22,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:22,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868436139] [2021-06-05 13:56:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:22,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:22,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868436139] [2021-06-05 13:56:22,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868436139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:22,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125028338] [2021-06-05 13:56:22,258 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 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 [2021-06-05 13:56:22,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:22,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:56:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:22,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125028338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:22,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:22,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:56:22,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226572109] [2021-06-05 13:56:22,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:22,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:22,330 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-05 13:56:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:22,401 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-06-05 13:56:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:56:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-05 13:56:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:22,405 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 13:56:22,405 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 13:56:22,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 13:56:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-06-05 13:56:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-06-05 13:56:22,441 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-06-05 13:56:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:22,441 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-06-05 13:56:22,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-05 13:56:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-06-05 13:56:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:22,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:22,444 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:22,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 13:56:22,667 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-06-05 13:56:22,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:22,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120723618] [2021-06-05 13:56:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:22,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:22,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120723618] [2021-06-05 13:56:22,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120723618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:22,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707637073] [2021-06-05 13:56:22,722 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 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 [2021-06-05 13:56:22,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:56:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:22,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:22,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707637073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:22,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:22,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 13:56:22,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510027336] [2021-06-05 13:56:22,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:22,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:22,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:22,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:22,799 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:22,874 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-06-05 13:56:22,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:56:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-06-05 13:56:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:22,877 INFO L225 Difference]: With dead ends: 2533 [2021-06-05 13:56:22,878 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 13:56:22,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 13:56:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-06-05 13:56:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-06-05 13:56:22,929 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-06-05 13:56:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:22,929 INFO L482 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-06-05 13:56:22,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-06-05 13:56:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:22,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:22,931 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:23,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 13:56:23,132 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:23,132 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-06-05 13:56:23,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:23,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875804033] [2021-06-05 13:56:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:23,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875804033] [2021-06-05 13:56:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875804033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201090007] [2021-06-05 13:56:23,189 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 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 [2021-06-05 13:56:23,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:23,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:23,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:23,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:23,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201090007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:23,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 13:56:23,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991603490] [2021-06-05 13:56:23,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:23,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:23,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:23,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:23,242 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:23,343 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-06-05 13:56:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-06-05 13:56:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:23,346 INFO L225 Difference]: With dead ends: 2537 [2021-06-05 13:56:23,346 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 13:56:23,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 13:56:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-06-05 13:56:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-06-05 13:56:23,368 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-06-05 13:56:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:23,368 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-06-05 13:56:23,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-06-05 13:56:23,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:23,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:23,370 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:23,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-05 13:56:23,571 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-06-05 13:56:23,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:23,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010797488] [2021-06-05 13:56:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:23,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010797488] [2021-06-05 13:56:23,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010797488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416844892] [2021-06-05 13:56:23,633 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 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 [2021-06-05 13:56:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:23,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416844892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:23,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 13:56:23,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818069851] [2021-06-05 13:56:23,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:23,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:23,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:23,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:23,686 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:23,804 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-06-05 13:56:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:23,806 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 13:56:23,807 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 13:56:23,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 13:56:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-06-05 13:56:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-06-05 13:56:23,840 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-06-05 13:56:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:23,840 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-06-05 13:56:23,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-06-05 13:56:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:23,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:23,843 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:24,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 13:56:24,057 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-06-05 13:56:24,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:24,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523842188] [2021-06-05 13:56:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:24,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:24,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523842188] [2021-06-05 13:56:24,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523842188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850486220] [2021-06-05 13:56:24,133 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 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 [2021-06-05 13:56:24,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:24,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850486220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:24,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 13:56:24,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329447827] [2021-06-05 13:56:24,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:24,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:24,215 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:24,375 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-06-05 13:56:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:24,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:24,378 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 13:56:24,378 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 13:56:24,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 13:56:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-06-05 13:56:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-06-05 13:56:24,405 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-06-05 13:56:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:24,405 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-06-05 13:56:24,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-06-05 13:56:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:24,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:24,407 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:24,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 13:56:24,608 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-06-05 13:56:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:24,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131131884] [2021-06-05 13:56:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:24,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:24,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131131884] [2021-06-05 13:56:24,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131131884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470523473] [2021-06-05 13:56:24,679 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 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 [2021-06-05 13:56:24,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:24,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:24,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470523473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:24,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:24,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341706088] [2021-06-05 13:56:24,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:24,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:24,763 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:24,898 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-06-05 13:56:24,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:24,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 20 [2021-06-05 13:56:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:24,900 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 13:56:24,900 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 13:56:24,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 13:56:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-06-05 13:56:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-06-05 13:56:24,924 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-06-05 13:56:24,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:24,924 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-06-05 13:56:24,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-06-05 13:56:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:24,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:24,926 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:25,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:25,126 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:25,128 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-06-05 13:56:25,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:25,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871515901] [2021-06-05 13:56:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:25,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:25,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871515901] [2021-06-05 13:56:25,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871515901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320634544] [2021-06-05 13:56:25,180 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 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 [2021-06-05 13:56:25,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:25,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:25,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:25,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:56:25,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320634544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:25,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:56:25,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233916444] [2021-06-05 13:56:25,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:25,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:25,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:25,259 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:25,373 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-06-05 13:56:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 20 [2021-06-05 13:56:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:25,376 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 13:56:25,376 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 13:56:25,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 13:56:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-06-05 13:56:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-06-05 13:56:25,409 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-06-05 13:56:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:25,409 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-06-05 13:56:25,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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) [2021-06-05 13:56:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-06-05 13:56:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:25,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:25,412 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:25,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:25,621 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-06-05 13:56:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:25,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336936570] [2021-06-05 13:56:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:25,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:25,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336936570] [2021-06-05 13:56:25,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336936570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544772485] [2021-06-05 13:56:25,700 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 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 [2021-06-05 13:56:25,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:25,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:25,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544772485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:25,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:25,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55764723] [2021-06-05 13:56:25,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:25,792 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2021-06-05 13:56:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:25,892 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-06-05 13:56:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 20 [2021-06-05 13:56:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:25,895 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 13:56:25,895 INFO L226 Difference]: Without dead ends: 2527 [2021-06-05 13:56:25,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-05 13:56:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-06-05 13:56:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-06-05 13:56:25,918 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-06-05 13:56:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:25,918 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-06-05 13:56:25,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2021-06-05 13:56:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-06-05 13:56:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:25,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:25,920 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:26,121 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-06-05 13:56:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75370415] [2021-06-05 13:56:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:26,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:26,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75370415] [2021-06-05 13:56:26,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75370415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493278013] [2021-06-05 13:56:26,182 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 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 [2021-06-05 13:56:26,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:26,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:26,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493278013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:26,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 13:56:26,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028676272] [2021-06-05 13:56:26,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:26,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:26,246 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:26,357 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-06-05 13:56:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:26,360 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 13:56:26,360 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 13:56:26,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 13:56:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-06-05 13:56:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-06-05 13:56:26,384 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-06-05 13:56:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:26,384 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-06-05 13:56:26,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-06-05 13:56:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:26,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:26,386 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:26,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:26,587 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:26,587 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-06-05 13:56:26,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:26,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014707110] [2021-06-05 13:56:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:26,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:26,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014707110] [2021-06-05 13:56:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014707110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162400242] [2021-06-05 13:56:26,650 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 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 [2021-06-05 13:56:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:26,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:26,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:26,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162400242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:26,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 13:56:26,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564876683] [2021-06-05 13:56:26,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:26,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:26,701 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:26,820 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-06-05 13:56:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:26,823 INFO L225 Difference]: With dead ends: 2612 [2021-06-05 13:56:26,823 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 13:56:26,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 13:56:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-06-05 13:56:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-06-05 13:56:26,846 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-06-05 13:56:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:26,846 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-06-05 13:56:26,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-06-05 13:56:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:26,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:26,848 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:27,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 13:56:27,053 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:27,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:27,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-06-05 13:56:27,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:27,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520959817] [2021-06-05 13:56:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:27,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:27,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520959817] [2021-06-05 13:56:27,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520959817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:27,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382612009] [2021-06-05 13:56:27,121 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 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 [2021-06-05 13:56:27,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382612009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:27,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:27,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:56:27,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899461695] [2021-06-05 13:56:27,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:27,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:27,179 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-06-05 13:56:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:27,248 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-06-05 13:56:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:27,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20 [2021-06-05 13:56:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:27,255 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 13:56:27,255 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 13:56:27,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 13:56:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-06-05 13:56:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-06-05 13:56:27,282 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-06-05 13:56:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:27,282 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-06-05 13:56:27,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-06-05 13:56:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-06-05 13:56:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:27,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:27,285 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:27,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 13:56:27,505 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-06-05 13:56:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:27,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939943249] [2021-06-05 13:56:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:27,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:27,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939943249] [2021-06-05 13:56:27,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939943249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:27,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011207650] [2021-06-05 13:56:27,573 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 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 [2021-06-05 13:56:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:27,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011207650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:27,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:27,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:27,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946058222] [2021-06-05 13:56:27,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:27,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:27,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:27,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:27,639 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 13:56:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:27,748 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-06-05 13:56:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 13:56:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:27,751 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 13:56:27,751 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 13:56:27,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 13:56:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-06-05 13:56:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-06-05 13:56:27,774 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-06-05 13:56:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:27,774 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-06-05 13:56:27,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 13:56:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-06-05 13:56:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:27,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:27,775 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:27,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 13:56:27,976 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-06-05 13:56:27,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:27,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103458907] [2021-06-05 13:56:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:28,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103458907] [2021-06-05 13:56:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103458907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260293117] [2021-06-05 13:56:28,030 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 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 [2021-06-05 13:56:28,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:28,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260293117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:28,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 13:56:28,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499952819] [2021-06-05 13:56:28,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:28,088 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:28,213 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-06-05 13:56:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:28,215 INFO L225 Difference]: With dead ends: 2572 [2021-06-05 13:56:28,215 INFO L226 Difference]: Without dead ends: 2567 [2021-06-05 13:56:28,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-06-05 13:56:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-06-05 13:56:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-06-05 13:56:28,239 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-06-05 13:56:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:28,239 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-06-05 13:56:28,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-06-05 13:56:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:28,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:28,241 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:28,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 13:56:28,442 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-06-05 13:56:28,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:28,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545379919] [2021-06-05 13:56:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:28,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:28,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545379919] [2021-06-05 13:56:28,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545379919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119806738] [2021-06-05 13:56:28,522 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 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 [2021-06-05 13:56:28,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119806738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:28,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:56:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850679244] [2021-06-05 13:56:28,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:28,586 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-06-05 13:56:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:28,726 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-06-05 13:56:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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 20 [2021-06-05 13:56:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:28,729 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 13:56:28,729 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 13:56:28,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 13:56:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-06-05 13:56:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-06-05 13:56:28,760 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-06-05 13:56:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:28,760 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-06-05 13:56:28,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-06-05 13:56:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-06-05 13:56:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:28,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:28,763 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:28,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:28,975 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-06-05 13:56:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:28,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621254773] [2021-06-05 13:56:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:29,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:29,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621254773] [2021-06-05 13:56:29,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621254773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104260983] [2021-06-05 13:56:29,046 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 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 [2021-06-05 13:56:29,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:29,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:29,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104260983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:29,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:56:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346593309] [2021-06-05 13:56:29,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:29,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:29,107 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:29,245 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-06-05 13:56:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:29,248 INFO L225 Difference]: With dead ends: 2689 [2021-06-05 13:56:29,248 INFO L226 Difference]: Without dead ends: 2681 [2021-06-05 13:56:29,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-06-05 13:56:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-06-05 13:56:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-06-05 13:56:29,273 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-06-05 13:56:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:29,273 INFO L482 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-06-05 13:56:29,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-06-05 13:56:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:29,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:29,275 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:29,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 13:56:29,499 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-06-05 13:56:29,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:29,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223977140] [2021-06-05 13:56:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:29,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223977140] [2021-06-05 13:56:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223977140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659556860] [2021-06-05 13:56:29,570 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 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 [2021-06-05 13:56:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:29,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:29,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659556860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:29,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:56:29,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948157657] [2021-06-05 13:56:29,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:29,640 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:29,779 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-06-05 13:56:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:29,782 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 13:56:29,782 INFO L226 Difference]: Without dead ends: 2660 [2021-06-05 13:56:29,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-06-05 13:56:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-06-05 13:56:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-06-05 13:56:29,804 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-06-05 13:56:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:29,804 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-06-05 13:56:29,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-06-05 13:56:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:29,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:29,806 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:30,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:30,006 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:30,007 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-06-05 13:56:30,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:30,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143550917] [2021-06-05 13:56:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:30,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143550917] [2021-06-05 13:56:30,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143550917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434333224] [2021-06-05 13:56:30,057 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 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 [2021-06-05 13:56:30,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:30,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:30,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434333224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:30,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:30,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377218480] [2021-06-05 13:56:30,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:30,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:30,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:30,121 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2021-06-05 13:56:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:30,206 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-06-05 13:56:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:56:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 20 [2021-06-05 13:56:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:30,208 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 13:56:30,208 INFO L226 Difference]: Without dead ends: 2669 [2021-06-05 13:56:30,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-06-05 13:56:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-06-05 13:56:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-06-05 13:56:30,231 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-06-05 13:56:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:30,231 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-06-05 13:56:30,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2021-06-05 13:56:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-06-05 13:56:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:30,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:30,233 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:30,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:30,435 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:30,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-06-05 13:56:30,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:30,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116611366] [2021-06-05 13:56:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:30,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:30,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116611366] [2021-06-05 13:56:30,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116611366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250631045] [2021-06-05 13:56:30,515 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 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 [2021-06-05 13:56:30,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:30,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:30,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:30,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250631045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:30,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:30,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976968724] [2021-06-05 13:56:30,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:30,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:30,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:30,574 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:30,678 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-06-05 13:56:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 20 [2021-06-05 13:56:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:30,681 INFO L225 Difference]: With dead ends: 2639 [2021-06-05 13:56:30,681 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 13:56:30,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 13:56:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-06-05 13:56:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-06-05 13:56:30,704 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-06-05 13:56:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:30,705 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-06-05 13:56:30,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 13:56:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-06-05 13:56:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:30,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:30,706 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:30,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-06-05 13:56:30,907 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:30,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-06-05 13:56:30,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:30,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422785425] [2021-06-05 13:56:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:30,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422785425] [2021-06-05 13:56:30,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422785425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751652482] [2021-06-05 13:56:30,971 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 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 [2021-06-05 13:56:30,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:30,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:30,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:31,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751652482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:31,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:56:31,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827752919] [2021-06-05 13:56:31,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:31,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:31,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:31,034 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:31,176 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-06-05 13:56:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:31,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:31,180 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 13:56:31,180 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 13:56:31,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 13:56:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-06-05 13:56:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-06-05 13:56:31,208 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-06-05 13:56:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:31,208 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-06-05 13:56:31,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-06-05 13:56:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:31,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:31,210 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:31,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:31,410 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-06-05 13:56:31,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:31,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372240364] [2021-06-05 13:56:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:31,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:31,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372240364] [2021-06-05 13:56:31,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372240364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732243562] [2021-06-05 13:56:31,480 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 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 [2021-06-05 13:56:31,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:31,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:31,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732243562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:31,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:56:31,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936718615] [2021-06-05 13:56:31,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:31,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:31,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:31,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:31,550 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:31,677 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-06-05 13:56:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:31,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:31,680 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 13:56:31,680 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 13:56:31,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 13:56:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-06-05 13:56:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-06-05 13:56:31,703 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-06-05 13:56:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:31,703 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-06-05 13:56:31,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-06-05 13:56:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:31,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:31,705 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:31,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:31,905 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-06-05 13:56:31,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:31,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149205015] [2021-06-05 13:56:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:31,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:31,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149205015] [2021-06-05 13:56:31,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149205015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740675561] [2021-06-05 13:56:31,951 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 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 [2021-06-05 13:56:31,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:31,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:31,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:31,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:32,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740675561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:32,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 13:56:32,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421163270] [2021-06-05 13:56:32,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:32,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:32,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:32,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:32,018 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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) [2021-06-05 13:56:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:32,093 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-06-05 13:56:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 20 [2021-06-05 13:56:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:32,095 INFO L225 Difference]: With dead ends: 2905 [2021-06-05 13:56:32,095 INFO L226 Difference]: Without dead ends: 2905 [2021-06-05 13:56:32,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-06-05 13:56:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-06-05 13:56:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-06-05 13:56:32,123 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-06-05 13:56:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:32,123 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-06-05 13:56:32,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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) [2021-06-05 13:56:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-06-05 13:56:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:32,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:32,125 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:32,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 13:56:32,326 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:32,326 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-06-05 13:56:32,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:32,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959516478] [2021-06-05 13:56:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:32,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959516478] [2021-06-05 13:56:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959516478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433679683] [2021-06-05 13:56:32,377 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 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 [2021-06-05 13:56:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:32,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:32,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:32,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433679683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:32,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 13:56:32,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859689142] [2021-06-05 13:56:32,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:32,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:32,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:32,436 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:32,564 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-06-05 13:56:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-06-05 13:56:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:32,567 INFO L225 Difference]: With dead ends: 2846 [2021-06-05 13:56:32,567 INFO L226 Difference]: Without dead ends: 2845 [2021-06-05 13:56:32,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-06-05 13:56:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-06-05 13:56:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-06-05 13:56:32,595 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-06-05 13:56:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:32,595 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-06-05 13:56:32,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-05 13:56:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-06-05 13:56:32,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:32,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:32,597 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:32,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:32,797 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-06-05 13:56:32,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:32,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146239538] [2021-06-05 13:56:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:32,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146239538] [2021-06-05 13:56:32,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146239538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041812656] [2021-06-05 13:56:32,850 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 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 [2021-06-05 13:56:32,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041812656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:32,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 13:56:32,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013458769] [2021-06-05 13:56:32,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:32,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:32,909 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:33,041 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-06-05 13:56:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:33,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:33,044 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 13:56:33,044 INFO L226 Difference]: Without dead ends: 2849 [2021-06-05 13:56:33,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-06-05 13:56:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-06-05 13:56:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-06-05 13:56:33,072 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-06-05 13:56:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:33,072 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-06-05 13:56:33,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-06-05 13:56:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:33,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:33,075 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:33,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 13:56:33,289 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:33,289 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-06-05 13:56:33,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:33,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224141050] [2021-06-05 13:56:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:33,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:33,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224141050] [2021-06-05 13:56:33,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224141050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:33,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761734436] [2021-06-05 13:56:33,352 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 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 [2021-06-05 13:56:33,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:33,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761734436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:33,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:33,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 13:56:33,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478467898] [2021-06-05 13:56:33,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:33,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:33,413 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:33,541 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-06-05 13:56:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:33,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-06-05 13:56:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:33,545 INFO L225 Difference]: With dead ends: 3212 [2021-06-05 13:56:33,546 INFO L226 Difference]: Without dead ends: 3209 [2021-06-05 13:56:33,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-06-05 13:56:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-06-05 13:56:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-06-05 13:56:33,582 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-06-05 13:56:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:33,582 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-06-05 13:56:33,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:56:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-06-05 13:56:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:33,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:33,585 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:33,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 13:56:33,808 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:33,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-06-05 13:56:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:33,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386511464] [2021-06-05 13:56:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:33,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:33,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386511464] [2021-06-05 13:56:33,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386511464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:33,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702866345] [2021-06-05 13:56:33,914 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 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 [2021-06-05 13:56:33,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:33,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:33,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702866345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:33,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:33,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:56:33,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831036970] [2021-06-05 13:56:33,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:33,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:33,979 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:34,100 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-06-05 13:56:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:34,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:34,103 INFO L225 Difference]: With dead ends: 3217 [2021-06-05 13:56:34,103 INFO L226 Difference]: Without dead ends: 3209 [2021-06-05 13:56:34,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-06-05 13:56:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-06-05 13:56:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-06-05 13:56:34,131 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-06-05 13:56:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:34,131 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-06-05 13:56:34,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-06-05 13:56:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:34,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:34,133 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:34,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 13:56:34,334 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-06-05 13:56:34,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:34,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903774154] [2021-06-05 13:56:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:34,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:34,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903774154] [2021-06-05 13:56:34,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903774154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633882231] [2021-06-05 13:56:34,404 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 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 [2021-06-05 13:56:34,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:34,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:34,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633882231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:34,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:56:34,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461025230] [2021-06-05 13:56:34,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:34,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:34,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:34,471 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:34,600 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-06-05 13:56:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:34,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:34,603 INFO L225 Difference]: With dead ends: 3000 [2021-06-05 13:56:34,603 INFO L226 Difference]: Without dead ends: 2995 [2021-06-05 13:56:34,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:34,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-06-05 13:56:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-06-05 13:56:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-06-05 13:56:34,630 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-06-05 13:56:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:34,630 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-06-05 13:56:34,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-06-05 13:56:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:34,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:34,632 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:34,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:34,832 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-06-05 13:56:34,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:34,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398365605] [2021-06-05 13:56:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:34,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398365605] [2021-06-05 13:56:34,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398365605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316833422] [2021-06-05 13:56:34,907 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 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 [2021-06-05 13:56:34,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:34,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316833422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:34,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:56:34,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230763347] [2021-06-05 13:56:34,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:34,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:34,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:34,972 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:35,078 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-06-05 13:56:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:35,081 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 13:56:35,081 INFO L226 Difference]: Without dead ends: 2960 [2021-06-05 13:56:35,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-06-05 13:56:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-06-05 13:56:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-06-05 13:56:35,122 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-06-05 13:56:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:35,122 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-06-05 13:56:35,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-06-05 13:56:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:35,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:35,125 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:35,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 13:56:35,347 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-06-05 13:56:35,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:35,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014762684] [2021-06-05 13:56:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:35,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014762684] [2021-06-05 13:56:35,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014762684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:35,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520763204] [2021-06-05 13:56:35,415 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 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 [2021-06-05 13:56:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:35,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:35,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520763204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:35,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:35,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:56:35,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003864711] [2021-06-05 13:56:35,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:35,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:35,489 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:35,610 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-06-05 13:56:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 20 [2021-06-05 13:56:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:35,613 INFO L225 Difference]: With dead ends: 2994 [2021-06-05 13:56:35,613 INFO L226 Difference]: Without dead ends: 2994 [2021-06-05 13:56:35,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-06-05 13:56:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-06-05 13:56:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-06-05 13:56:35,640 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-06-05 13:56:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:35,640 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-06-05 13:56:35,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 13:56:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-06-05 13:56:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:35,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:35,642 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:35,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:35,843 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-06-05 13:56:35,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:35,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563661575] [2021-06-05 13:56:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:35,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:35,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563661575] [2021-06-05 13:56:35,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563661575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:35,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736017711] [2021-06-05 13:56:35,923 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 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 [2021-06-05 13:56:35,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:36,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736017711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:36,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:36,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 13:56:36,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209353771] [2021-06-05 13:56:36,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:36,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:36,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:36,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:36,002 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:36,136 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-06-05 13:56:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:36,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:36,139 INFO L225 Difference]: With dead ends: 2954 [2021-06-05 13:56:36,139 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 13:56:36,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 13:56:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-06-05 13:56:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-06-05 13:56:36,165 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-06-05 13:56:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:36,165 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-06-05 13:56:36,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-06-05 13:56:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:36,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:36,167 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:36,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:36,368 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:36,368 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-06-05 13:56:36,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:36,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058467568] [2021-06-05 13:56:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:36,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:36,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058467568] [2021-06-05 13:56:36,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058467568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:36,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887740760] [2021-06-05 13:56:36,458 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 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 [2021-06-05 13:56:36,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:36,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:36,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887740760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:36,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:36,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 13:56:36,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316308839] [2021-06-05 13:56:36,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:36,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:36,550 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 13:56:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:36,682 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-06-05 13:56:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:36,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 20 [2021-06-05 13:56:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:36,685 INFO L225 Difference]: With dead ends: 3147 [2021-06-05 13:56:36,685 INFO L226 Difference]: Without dead ends: 3132 [2021-06-05 13:56:36,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-06-05 13:56:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-06-05 13:56:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-06-05 13:56:36,724 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-06-05 13:56:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:36,724 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-06-05 13:56:36,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 13:56:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-06-05 13:56:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:36,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:36,726 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:36,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:36,927 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-06-05 13:56:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:36,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735461998] [2021-06-05 13:56:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:37,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:37,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735461998] [2021-06-05 13:56:37,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735461998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330805799] [2021-06-05 13:56:37,001 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 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 [2021-06-05 13:56:37,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:37,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:37,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:37,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:37,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330805799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:37,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 13:56:37,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998257152] [2021-06-05 13:56:37,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:37,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:37,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:37,069 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:37,208 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-06-05 13:56:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:37,211 INFO L225 Difference]: With dead ends: 3023 [2021-06-05 13:56:37,211 INFO L226 Difference]: Without dead ends: 3017 [2021-06-05 13:56:37,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-06-05 13:56:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-06-05 13:56:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-06-05 13:56:37,242 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-06-05 13:56:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:37,242 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-06-05 13:56:37,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-06-05 13:56:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:37,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:37,244 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:37,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:37,445 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-06-05 13:56:37,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:37,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310943109] [2021-06-05 13:56:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:37,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:37,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310943109] [2021-06-05 13:56:37,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310943109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536187239] [2021-06-05 13:56:37,512 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 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 [2021-06-05 13:56:37,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:56:37,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:37,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536187239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:37,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-06-05 13:56:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110925022] [2021-06-05 13:56:37,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:37,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:37,583 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2021-06-05 13:56:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:37,678 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-06-05 13:56:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 [2021-06-05 13:56:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:37,682 INFO L225 Difference]: With dead ends: 3263 [2021-06-05 13:56:37,682 INFO L226 Difference]: Without dead ends: 3263 [2021-06-05 13:56:37,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-06-05 13:56:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-06-05 13:56:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-06-05 13:56:37,724 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-06-05 13:56:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:37,724 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-06-05 13:56:37,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2021-06-05 13:56:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-06-05 13:56:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:37,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:37,727 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:37,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 13:56:37,927 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-06-05 13:56:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:37,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538582834] [2021-06-05 13:56:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:37,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:37,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538582834] [2021-06-05 13:56:37,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538582834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845400441] [2021-06-05 13:56:37,990 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 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 [2021-06-05 13:56:38,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:38,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:38,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845400441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:38,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-06-05 13:56:38,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624152297] [2021-06-05 13:56:38,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:38,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:38,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:38,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:38,049 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 13:56:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:38,175 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-06-05 13:56:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 [2021-06-05 13:56:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:38,178 INFO L225 Difference]: With dead ends: 3211 [2021-06-05 13:56:38,178 INFO L226 Difference]: Without dead ends: 3210 [2021-06-05 13:56:38,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-06-05 13:56:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-06-05 13:56:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-06-05 13:56:38,209 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-06-05 13:56:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:38,210 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-06-05 13:56:38,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 13:56:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-06-05 13:56:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:38,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:38,212 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:38,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 13:56:38,412 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-06-05 13:56:38,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:38,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311194669] [2021-06-05 13:56:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:38,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:38,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311194669] [2021-06-05 13:56:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311194669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574018886] [2021-06-05 13:56:38,478 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 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 [2021-06-05 13:56:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:38,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574018886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:38,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 13:56:38,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171353042] [2021-06-05 13:56:38,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:38,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:38,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:38,555 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 13:56:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:38,695 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-06-05 13:56:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 [2021-06-05 13:56:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:38,698 INFO L225 Difference]: With dead ends: 3214 [2021-06-05 13:56:38,698 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 13:56:38,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 13:56:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-06-05 13:56:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-06-05 13:56:38,727 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-06-05 13:56:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:38,727 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-06-05 13:56:38,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 13:56:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-06-05 13:56:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:38,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:38,729 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:38,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 13:56:38,930 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-06-05 13:56:38,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:38,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722675799] [2021-06-05 13:56:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:38,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:38,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722675799] [2021-06-05 13:56:38,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722675799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833864597] [2021-06-05 13:56:38,999 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 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 [2021-06-05 13:56:39,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:39,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:39,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:39,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833864597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:39,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:39,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 13:56:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868282197] [2021-06-05 13:56:39,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:39,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:39,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:39,087 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 13:56:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:39,234 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-06-05 13:56:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:39,234 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 [2021-06-05 13:56:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:39,238 INFO L225 Difference]: With dead ends: 3712 [2021-06-05 13:56:39,239 INFO L226 Difference]: Without dead ends: 3709 [2021-06-05 13:56:39,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-06-05 13:56:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-06-05 13:56:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-06-05 13:56:39,277 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-06-05 13:56:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:39,277 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-06-05 13:56:39,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 13:56:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-06-05 13:56:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:39,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:39,280 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:39,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 13:56:39,481 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-06-05 13:56:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:39,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725561957] [2021-06-05 13:56:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:39,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:39,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725561957] [2021-06-05 13:56:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725561957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124830917] [2021-06-05 13:56:39,571 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 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 [2021-06-05 13:56:39,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:39,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:39,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:56:39,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124830917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:39,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:39,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 13:56:39,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791703197] [2021-06-05 13:56:39,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:39,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:39,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:39,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:39,660 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 13:56:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:39,779 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-06-05 13:56:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:39,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 [2021-06-05 13:56:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:39,783 INFO L225 Difference]: With dead ends: 3583 [2021-06-05 13:56:39,783 INFO L226 Difference]: Without dead ends: 3579 [2021-06-05 13:56:39,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-06-05 13:56:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-06-05 13:56:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-06-05 13:56:39,813 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-06-05 13:56:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:39,813 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-06-05 13:56:39,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 13:56:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-06-05 13:56:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:39,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:39,815 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:40,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:40,016 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:40,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-06-05 13:56:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:40,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410068524] [2021-06-05 13:56:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:40,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:40,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410068524] [2021-06-05 13:56:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410068524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:40,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420656528] [2021-06-05 13:56:40,100 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 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 [2021-06-05 13:56:40,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:40,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:40,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:40,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:40,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420656528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:40,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:40,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-06-05 13:56:40,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805994028] [2021-06-05 13:56:40,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:40,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:40,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:40,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:40,192 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:56:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:40,354 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-06-05 13:56:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2021-06-05 13:56:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:40,361 INFO L225 Difference]: With dead ends: 3595 [2021-06-05 13:56:40,361 INFO L226 Difference]: Without dead ends: 3580 [2021-06-05 13:56:40,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-06-05 13:56:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-06-05 13:56:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-06-05 13:56:40,418 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-06-05 13:56:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:40,418 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-06-05 13:56:40,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:56:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-06-05 13:56:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:40,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:40,421 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:40,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 13:56:40,644 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:40,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-06-05 13:56:40,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:40,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270499045] [2021-06-05 13:56:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270499045] [2021-06-05 13:56:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270499045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381232039] [2021-06-05 13:56:40,727 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 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 [2021-06-05 13:56:40,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:40,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:40,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:40,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381232039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:40,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:40,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-06-05 13:56:40,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481816935] [2021-06-05 13:56:40,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:40,809 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:56:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:40,934 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-06-05 13:56:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2021-06-05 13:56:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:40,937 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 13:56:40,937 INFO L226 Difference]: Without dead ends: 3377 [2021-06-05 13:56:40,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-06-05 13:56:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-06-05 13:56:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-06-05 13:56:40,967 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-06-05 13:56:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:40,967 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-06-05 13:56:40,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 13:56:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-06-05 13:56:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:56:40,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:40,969 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:41,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 13:56:41,170 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:41,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-06-05 13:56:41,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:41,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046902814] [2021-06-05 13:56:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:41,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046902814] [2021-06-05 13:56:41,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046902814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892754562] [2021-06-05 13:56:41,250 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 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 [2021-06-05 13:56:41,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:41,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:56:41,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892754562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:41,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:41,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 13:56:41,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781367622] [2021-06-05 13:56:41,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:41,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:41,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:41,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:41,335 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 13:56:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:41,469 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-06-05 13:56:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 20 [2021-06-05 13:56:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:41,473 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 13:56:41,473 INFO L226 Difference]: Without dead ends: 3339 [2021-06-05 13:56:41,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:56:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-06-05 13:56:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-06-05 13:56:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-06-05 13:56:41,502 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-06-05 13:56:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:41,502 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-06-05 13:56:41,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 13:56:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-06-05 13:56:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:56:41,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:41,504 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:41,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 13:56:41,704 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-06-05 13:56:41,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:41,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576076144] [2021-06-05 13:56:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:41,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:41,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576076144] [2021-06-05 13:56:41,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576076144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:41,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918127629] [2021-06-05 13:56:41,765 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 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 [2021-06-05 13:56:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:56:41,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:42,133 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:56:42,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:56:43,674 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-06-05 13:56:43,801 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-06-05 13:56:43,960 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 303 [2021-06-05 13:56:44,179 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 389 [2021-06-05 13:56:44,313 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 302 [2021-06-05 13:56:44,459 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 293 [2021-06-05 13:56:45,633 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 244 [2021-06-05 13:56:45,766 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 252 [2021-06-05 13:56:46,007 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-06-05 13:56:46,259 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-06-05 13:56:46,481 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 297 [2021-06-05 13:56:46,610 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 234 [2021-06-05 13:56:47,374 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 150 [2021-06-05 13:56:47,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:47,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:47,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:47,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:56:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:47,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918127629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:47,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:56:47,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416886121] [2021-06-05 13:56:47,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:56:47,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:47,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:56:47,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:47,558 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-06-05 13:56:47,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:47,763 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-06-05 13:56:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:56:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 21 [2021-06-05 13:56:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:47,767 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 13:56:47,767 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 13:56:47,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 13:56:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-06-05 13:56:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-06-05 13:56:47,798 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-06-05 13:56:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:47,798 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-06-05 13:56:47,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-06-05 13:56:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-06-05 13:56:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:56:47,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:47,800 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:48,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:48,001 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-06-05 13:56:48,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:48,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246085122] [2021-06-05 13:56:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:48,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:48,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246085122] [2021-06-05 13:56:48,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246085122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161262283] [2021-06-05 13:56:48,074 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 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 [2021-06-05 13:56:48,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:48,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:48,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:56:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:48,418 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:56:48,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:48,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:56:49,255 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-06-05 13:56:49,421 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-06-05 13:56:49,546 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 255 [2021-06-05 13:56:49,680 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 268 [2021-06-05 13:56:49,791 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 277 [2021-06-05 13:56:49,970 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 340 [2021-06-05 13:56:50,922 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 284 [2021-06-05 13:56:51,109 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 304 [2021-06-05 13:56:51,358 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-06-05 13:56:51,588 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-06-05 13:56:51,850 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 332 [2021-06-05 13:56:52,381 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 351 [2021-06-05 13:56:52,571 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 214 [2021-06-05 13:56:53,185 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 268 [2021-06-05 13:56:53,644 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-06-05 13:56:53,804 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-06-05 13:56:53,964 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 269 [2021-06-05 13:56:54,107 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 277 [2021-06-05 13:56:54,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:54,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:54,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:54,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:56:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161262283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:56:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844269077] [2021-06-05 13:56:54,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:56:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:56:54,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:54,894 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:55,107 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-06-05 13:56:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:56:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:56:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:55,111 INFO L225 Difference]: With dead ends: 3204 [2021-06-05 13:56:55,111 INFO L226 Difference]: Without dead ends: 3200 [2021-06-05 13:56:55,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-06-05 13:56:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-06-05 13:56:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-06-05 13:56:55,142 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-06-05 13:56:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:55,142 INFO L482 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-06-05 13:56:55,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-06-05 13:56:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:56:55,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:55,144 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:55,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-06-05 13:56:55,345 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:55,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-06-05 13:56:55,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:55,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979007814] [2021-06-05 13:56:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:55,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:55,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979007814] [2021-06-05 13:56:55,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979007814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381127194] [2021-06-05 13:56:55,405 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 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 [2021-06-05 13:56:55,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:56:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:55,755 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:56:55,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:56:56,320 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 221 [2021-06-05 13:56:56,611 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 243 [2021-06-05 13:56:56,838 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 320 [2021-06-05 13:56:57,027 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 293 [2021-06-05 13:56:57,153 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 243 [2021-06-05 13:56:58,082 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 217 [2021-06-05 13:56:58,833 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 355 [2021-06-05 13:57:00,054 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 244 [2021-06-05 13:57:00,416 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 526 [2021-06-05 13:57:00,950 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 620 [2021-06-05 13:57:01,551 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 627 [2021-06-05 13:57:02,331 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-06-05 13:57:03,119 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-06-05 13:57:03,964 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 737 [2021-06-05 13:57:04,222 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 469 [2021-06-05 13:57:04,365 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 360 [2021-06-05 13:57:04,542 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 360 [2021-06-05 13:57:05,253 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 228 [2021-06-05 13:57:05,440 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-06-05 13:57:05,605 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-06-05 13:57:05,789 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 312 [2021-06-05 13:57:06,071 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2021-06-05 13:57:06,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:06,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:06,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:06,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:57:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:06,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381127194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:06,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:06,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:57:06,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987081208] [2021-06-05 13:57:06,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:57:06,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:06,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:57:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:06,440 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:06,674 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-06-05 13:57:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:57:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:06,678 INFO L225 Difference]: With dead ends: 3276 [2021-06-05 13:57:06,678 INFO L226 Difference]: Without dead ends: 3272 [2021-06-05 13:57:06,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-06-05 13:57:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-06-05 13:57:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-06-05 13:57:06,713 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-06-05 13:57:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:06,713 INFO L482 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-06-05 13:57:06,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-06-05 13:57:06,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:57:06,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:06,715 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:06,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-06-05 13:57:06,918 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-06-05 13:57:06,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:06,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88036216] [2021-06-05 13:57:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:06,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:06,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88036216] [2021-06-05 13:57:06,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88036216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:06,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428879783] [2021-06-05 13:57:06,975 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 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 [2021-06-05 13:57:07,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:07,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:57:07,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:07,342 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:57:07,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:07,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:57:07,997 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 238 [2021-06-05 13:57:08,125 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 257 [2021-06-05 13:57:10,001 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 163 [2021-06-05 13:57:10,454 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 300 [2021-06-05 13:57:10,675 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 388 [2021-06-05 13:57:10,979 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 391 [2021-06-05 13:57:11,353 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 436 [2021-06-05 13:57:11,961 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 485 [2021-06-05 13:57:12,752 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 248 [2021-06-05 13:57:13,331 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 308 [2021-06-05 13:57:13,702 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 349 [2021-06-05 13:57:14,026 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 366 [2021-06-05 13:57:14,863 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 721 [2021-06-05 13:57:15,839 WARN L205 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-06-05 13:57:16,825 WARN L205 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-06-05 13:57:17,906 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1306 DAG size of output: 771 [2021-06-05 13:57:18,977 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 770 DAG size of output: 843 [2021-06-05 13:57:19,293 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 345 [2021-06-05 13:57:20,351 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 655 [2021-06-05 13:57:20,646 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 380 [2021-06-05 13:57:21,190 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 247 [2021-06-05 13:57:21,427 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-06-05 13:57:21,643 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-06-05 13:57:21,960 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 376 [2021-06-05 13:57:22,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:22,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:22,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:22,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:57:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:22,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428879783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:22,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:57:22,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658028989] [2021-06-05 13:57:22,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:57:22,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:57:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:22,637 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:22,813 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-06-05 13:57:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:57:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:22,816 INFO L225 Difference]: With dead ends: 3340 [2021-06-05 13:57:22,816 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 13:57:22,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 13:57:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-06-05 13:57:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-06-05 13:57:22,846 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-06-05 13:57:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:22,846 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-06-05 13:57:22,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-06-05 13:57:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:57:22,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:22,848 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:23,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:23,053 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-06-05 13:57:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059939875] [2021-06-05 13:57:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:23,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:23,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059939875] [2021-06-05 13:57:23,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059939875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65702265] [2021-06-05 13:57:23,110 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 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 [2021-06-05 13:57:23,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:57:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:23,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:57:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:23,445 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:57:23,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:23,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:57:24,048 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 222 [2021-06-05 13:57:24,241 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 230 [2021-06-05 13:57:24,425 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 314 [2021-06-05 13:57:24,555 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 235 [2021-06-05 13:57:25,145 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 243 [2021-06-05 13:57:25,747 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 344 [2021-06-05 13:57:26,014 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 351 [2021-06-05 13:57:26,832 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 219 [2021-06-05 13:57:27,014 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 280 [2021-06-05 13:57:27,474 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-06-05 13:57:27,945 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-06-05 13:57:28,438 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 511 [2021-06-05 13:57:28,924 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 517 [2021-06-05 13:57:29,516 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 410 [2021-06-05 13:57:30,387 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-06-05 13:57:30,629 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-06-05 13:57:30,888 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-06-05 13:57:31,224 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 387 [2021-06-05 13:57:32,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:32,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:32,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:32,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:57:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:32,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65702265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:32,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:57:32,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093096682] [2021-06-05 13:57:32,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:57:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:57:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:32,327 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:32,525 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-06-05 13:57:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:57:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:32,529 INFO L225 Difference]: With dead ends: 3397 [2021-06-05 13:57:32,529 INFO L226 Difference]: Without dead ends: 3392 [2021-06-05 13:57:32,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-06-05 13:57:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-06-05 13:57:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-06-05 13:57:32,563 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-06-05 13:57:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:32,563 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-06-05 13:57:32,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-06-05 13:57:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:57:32,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:32,566 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:32,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3337 [2021-06-05 13:57:32,766 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-06-05 13:57:32,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:32,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048848483] [2021-06-05 13:57:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:32,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048848483] [2021-06-05 13:57:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048848483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354265220] [2021-06-05 13:57:32,832 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 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 [2021-06-05 13:57:32,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:57:32,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:33,217 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:57:33,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:33,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:57:33,926 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 235 [2021-06-05 13:57:34,039 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 242 [2021-06-05 13:57:34,671 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 248 [2021-06-05 13:57:35,519 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-06-05 13:57:35,745 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-06-05 13:57:36,010 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 348 [2021-06-05 13:57:36,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:36,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:36,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:36,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:57:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:36,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354265220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:36,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:57:36,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960638136] [2021-06-05 13:57:36,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:57:36,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:57:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:36,968 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:37,217 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-06-05 13:57:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:57:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:37,221 INFO L225 Difference]: With dead ends: 3484 [2021-06-05 13:57:37,221 INFO L226 Difference]: Without dead ends: 3480 [2021-06-05 13:57:37,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-06-05 13:57:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-06-05 13:57:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-06-05 13:57:37,254 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-06-05 13:57:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:37,254 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-06-05 13:57:37,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-06-05 13:57:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:57:37,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:37,257 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3893,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:37,458 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-06-05 13:57:37,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409023494] [2021-06-05 13:57:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:37,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409023494] [2021-06-05 13:57:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409023494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140013649] [2021-06-05 13:57:37,516 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 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 [2021-06-05 13:57:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,900 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:57:37,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:57:39,423 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-06-05 13:57:39,552 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-06-05 13:57:39,749 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 272 [2021-06-05 13:57:39,868 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 236 [2021-06-05 13:57:40,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:40,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:40,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:40,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:57:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140013649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:57:40,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710771835] [2021-06-05 13:57:40,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:57:40,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:57:40,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:40,495 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:40,708 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-06-05 13:57:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:57:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:40,713 INFO L225 Difference]: With dead ends: 3580 [2021-06-05 13:57:40,713 INFO L226 Difference]: Without dead ends: 3576 [2021-06-05 13:57:40,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-06-05 13:57:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-06-05 13:57:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-06-05 13:57:40,752 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-06-05 13:57:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:40,752 INFO L482 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-06-05 13:57:40,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-06-05 13:57:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:57:40,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:40,755 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:40,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4195 [2021-06-05 13:57:40,956 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-06-05 13:57:40,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:40,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495621589] [2021-06-05 13:57:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:41,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:41,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495621589] [2021-06-05 13:57:41,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495621589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587570554] [2021-06-05 13:57:41,014 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 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 [2021-06-05 13:57:41,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:41,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:57:41,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:41,397 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:57:41,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:57:42,703 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 235 [2021-06-05 13:57:43,329 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 204 [2021-06-05 13:57:43,532 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-06-05 13:57:43,733 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-06-05 13:57:43,956 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 334 [2021-06-05 13:57:44,117 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 378 [2021-06-05 13:57:44,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:44,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:44,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:44,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:57:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587570554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:44,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:57:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634681304] [2021-06-05 13:57:44,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:57:44,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:44,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:57:44,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:44,890 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:45,190 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-06-05 13:57:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:45,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:57:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:45,195 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 13:57:45,195 INFO L226 Difference]: Without dead ends: 3934 [2021-06-05 13:57:45,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-06-05 13:57:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-06-05 13:57:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-06-05 13:57:45,235 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-06-05 13:57:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:45,235 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-06-05 13:57:45,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-06-05 13:57:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:57:45,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:45,238 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:45,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4581,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:45,439 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:45,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-06-05 13:57:45,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:45,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402729922] [2021-06-05 13:57:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:45,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:45,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402729922] [2021-06-05 13:57:45,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402729922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:45,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49757062] [2021-06-05 13:57:45,497 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 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 [2021-06-05 13:57:45,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:45,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:57:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:45,847 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:57:45,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:45,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:57:46,540 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2021-06-05 13:57:46,686 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-06-05 13:57:46,828 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-06-05 13:57:47,000 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 308 [2021-06-05 13:57:47,304 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 371 [2021-06-05 13:57:47,425 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 286 [2021-06-05 13:57:47,627 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 343 [2021-06-05 13:57:47,765 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 296 [2021-06-05 13:57:49,057 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 300 [2021-06-05 13:57:51,119 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 236 [2021-06-05 13:57:51,370 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 342 [2021-06-05 13:57:51,741 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 494 [2021-06-05 13:57:52,480 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 728 [2021-06-05 13:57:52,719 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 338 [2021-06-05 13:57:52,959 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 347 [2021-06-05 13:57:53,702 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 309 [2021-06-05 13:57:54,218 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 13:57:54,867 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 249 [2021-06-05 13:57:55,144 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 449 [2021-06-05 13:57:55,592 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 568 [2021-06-05 13:57:56,414 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 263 [2021-06-05 13:57:57,160 WARN L205 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 763 [2021-06-05 13:57:57,338 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 273 [2021-06-05 13:57:58,626 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 274 [2021-06-05 13:57:58,873 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 376 [2021-06-05 13:57:59,715 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 495 [2021-06-05 13:58:01,028 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 1457 DAG size of output: 1160 [2021-06-05 13:58:03,276 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 2117 DAG size of output: 1722 [2021-06-05 13:58:05,798 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 2126 DAG size of output: 1700 [2021-06-05 13:58:08,479 WARN L205 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 2297 DAG size of output: 1855 [2021-06-05 13:58:11,526 WARN L205 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 2314 DAG size of output: 1868 [2021-06-05 13:58:15,028 WARN L205 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-06-05 13:58:18,576 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-06-05 13:58:22,570 WARN L205 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 2413 DAG size of output: 1935 [2021-06-05 13:58:27,354 WARN L205 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 1937 DAG size of output: 1926 [2021-06-05 13:58:27,513 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 1913 [2021-06-05 13:58:27,700 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 292 [2021-06-05 13:58:27,842 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 247 [2021-06-05 13:58:27,975 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 272 [2021-06-05 13:58:29,286 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 224 [2021-06-05 13:58:30,506 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 271 [2021-06-05 13:58:30,756 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 324 [2021-06-05 13:58:31,498 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 898 DAG size of output: 474 [2021-06-05 13:58:33,989 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 1831 DAG size of output: 1691 [2021-06-05 13:58:35,439 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1637 [2021-06-05 13:58:35,640 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1484 [2021-06-05 13:58:36,757 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 428 [2021-06-05 13:58:37,132 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 471 [2021-06-05 13:58:38,024 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-06-05 13:58:38,160 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-06-05 13:58:38,458 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 935 [2021-06-05 13:58:39,281 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 562 [2021-06-05 13:58:39,663 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 370 [2021-06-05 13:58:40,061 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 325 [2021-06-05 13:58:40,191 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 216 [2021-06-05 13:58:40,688 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-06-05 13:58:40,851 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-06-05 13:58:41,100 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 177 [2021-06-05 13:58:41,920 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 457 [2021-06-05 13:58:42,409 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 1452 DAG size of output: 748 [2021-06-05 13:58:42,642 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 269 [2021-06-05 13:58:43,166 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 225 [2021-06-05 13:58:43,309 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 238 [2021-06-05 13:58:43,980 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 265 [2021-06-05 13:58:44,155 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 297 [2021-06-05 13:58:44,986 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 987 [2021-06-05 13:58:46,180 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1941 DAG size of output: 1041 [2021-06-05 13:58:47,757 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 2661 DAG size of output: 1346 [2021-06-05 13:58:49,632 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-06-05 13:58:51,472 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-06-05 13:58:53,386 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 2695 DAG size of output: 1379 [2021-06-05 13:58:55,429 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1381 DAG size of output: 1259 [2021-06-05 13:58:56,483 WARN L205 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 759 [2021-06-05 13:58:56,931 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 217 [2021-06-05 13:58:57,276 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 234 [2021-06-05 13:58:57,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:58:57,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:58:57,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:58:57,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:58:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:57,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49757062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:57,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:57,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:58:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875752637] [2021-06-05 13:58:57,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:58:57,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:58:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:58:57,666 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:57,887 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-06-05 13:58:57,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:57,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:57,891 INFO L225 Difference]: With dead ends: 4316 [2021-06-05 13:58:57,891 INFO L226 Difference]: Without dead ends: 4313 [2021-06-05 13:58:57,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:58:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-06-05 13:58:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-06-05 13:58:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-06-05 13:58:57,931 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-06-05 13:58:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:57,931 INFO L482 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-06-05 13:58:57,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-06-05 13:58:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:57,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:57,935 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:58,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5056 [2021-06-05 13:58:58,136 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:58,136 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-06-05 13:58:58,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:58,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724143875] [2021-06-05 13:58:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:58,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:58,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724143875] [2021-06-05 13:58:58,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724143875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:58,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930884840] [2021-06-05 13:58:58,194 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 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 [2021-06-05 13:58:58,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:58,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:58:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:58,538 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 13:58:58,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:58:58,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 13:58:59,325 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 261 [2021-06-05 13:59:00,086 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 304 [2021-06-05 13:59:00,225 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 325 [2021-06-05 13:59:00,499 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-06-05 13:59:00,773 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-06-05 13:59:01,098 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 660 DAG size of output: 479 [2021-06-05 13:59:01,584 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 581 [2021-06-05 13:59:02,368 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 648 [2021-06-05 13:59:02,752 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 467 [2021-06-05 13:59:03,021 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 303 [2021-06-05 13:59:03,659 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 257 [2021-06-05 13:59:03,849 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 329 [2021-06-05 13:59:04,927 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 173 [2021-06-05 13:59:05,442 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 269 [2021-06-05 13:59:05,795 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 464 [2021-06-05 13:59:06,384 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 644 [2021-06-05 13:59:06,825 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 547 [2021-06-05 13:59:07,954 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 231 [2021-06-05 13:59:08,110 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 232 [2021-06-05 13:59:08,660 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 275 [2021-06-05 13:59:08,868 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2021-06-05 13:59:09,540 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 262 [2021-06-05 13:59:09,870 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 348 [2021-06-05 13:59:10,526 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 571 [2021-06-05 13:59:11,293 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 224 [2021-06-05 13:59:12,196 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 357 [2021-06-05 13:59:13,233 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1093 DAG size of output: 799 [2021-06-05 13:59:14,854 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1557 DAG size of output: 1132 [2021-06-05 13:59:15,189 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 453 [2021-06-05 13:59:15,776 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 540 [2021-06-05 13:59:16,352 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 200 [2021-06-05 13:59:16,472 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 216 [2021-06-05 13:59:16,935 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 188 [2021-06-05 13:59:17,840 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 298 [2021-06-05 13:59:18,120 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 390 [2021-06-05 13:59:19,069 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 598 [2021-06-05 13:59:19,827 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 243 [2021-06-05 13:59:19,977 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 265 [2021-06-05 13:59:20,128 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 288 [2021-06-05 13:59:20,545 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 233 [2021-06-05 13:59:21,075 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 272 [2021-06-05 13:59:21,189 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 275 [2021-06-05 13:59:21,379 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 350 [2021-06-05 13:59:21,695 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 447 [2021-06-05 13:59:21,900 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 240 [2021-06-05 13:59:22,446 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-06-05 13:59:22,926 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 727 DAG size of output: 614 [2021-06-05 13:59:24,413 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 910 [2021-06-05 13:59:26,012 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 1515 DAG size of output: 1270 [2021-06-05 13:59:27,977 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 1698 DAG size of output: 1431 [2021-06-05 13:59:32,099 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-06-05 13:59:36,260 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-06-05 13:59:40,724 WARN L205 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 2771 DAG size of output: 2217 [2021-06-05 13:59:41,476 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 2217 DAG size of output: 1860 [2021-06-05 13:59:43,963 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 1349 DAG size of output: 1709 [2021-06-05 13:59:44,211 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 424 [2021-06-05 13:59:44,394 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 280 [2021-06-05 13:59:44,806 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 258 [2021-06-05 13:59:45,236 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 251 [2021-06-05 13:59:45,421 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 263 [2021-06-05 13:59:45,837 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 1145 DAG size of output: 624 [2021-06-05 13:59:46,743 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 580 [2021-06-05 13:59:47,222 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 253 [2021-06-05 13:59:47,658 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 289 [2021-06-05 13:59:47,875 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 371 [2021-06-05 13:59:48,189 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 762 DAG size of output: 476 [2021-06-05 13:59:48,698 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 1117 DAG size of output: 562 [2021-06-05 13:59:49,154 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 491 [2021-06-05 13:59:49,302 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 313 [2021-06-05 13:59:50,439 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 304 [2021-06-05 13:59:50,776 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 461 [2021-06-05 13:59:50,944 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 329 [2021-06-05 13:59:51,388 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 224 [2021-06-05 13:59:51,928 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 310 [2021-06-05 13:59:52,288 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 496 [2021-06-05 13:59:53,252 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-06-05 13:59:54,211 WARN L205 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-06-05 13:59:55,243 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1845 DAG size of output: 928 [2021-06-05 13:59:56,375 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 930 DAG size of output: 1088 [2021-06-05 13:59:56,701 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 261 [2021-06-05 13:59:57,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:57,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:57,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:57,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 13:59:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:57,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930884840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:57,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:57,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 13:59:57,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190366755] [2021-06-05 13:59:57,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:59:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:59:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:57,738 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:57,978 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-06-05 13:59:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:59:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:57,983 INFO L225 Difference]: With dead ends: 4620 [2021-06-05 13:59:57,983 INFO L226 Difference]: Without dead ends: 4617 [2021-06-05 13:59:57,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-06-05 13:59:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-06-05 13:59:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-06-05 13:59:58,027 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-06-05 13:59:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:58,027 INFO L482 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-06-05 13:59:58,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-06-05 13:59:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:59:58,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:58,031 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:58,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7776 [2021-06-05 13:59:58,232 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:58,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-06-05 13:59:58,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:58,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954839861] [2021-06-05 13:59:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:58,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954839861] [2021-06-05 13:59:58,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954839861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273414025] [2021-06-05 13:59:58,316 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 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 [2021-06-05 13:59:58,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:59:58,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:59:58,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273414025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:58,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:59:58,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338707418] [2021-06-05 13:59:58,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:59:58,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:59:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:58,393 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 13:59:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:58,665 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-06-05 13:59:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:59:58,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 13:59:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:58,670 INFO L225 Difference]: With dead ends: 4872 [2021-06-05 13:59:58,670 INFO L226 Difference]: Without dead ends: 4863 [2021-06-05 13:59:58,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:59:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-06-05 13:59:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-06-05 13:59:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-06-05 13:59:58,718 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-06-05 13:59:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:58,718 INFO L482 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-06-05 13:59:58,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 13:59:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-06-05 13:59:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:59:58,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:58,722 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:58,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9859,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:58,922 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-06-05 13:59:58,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:58,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445489392] [2021-06-05 13:59:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:58,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445489392] [2021-06-05 13:59:58,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445489392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819630820] [2021-06-05 13:59:58,992 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 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 [2021-06-05 13:59:59,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:59:59,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:59,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:59:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:59,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819630820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:59,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:59,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:59:59,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348726721] [2021-06-05 13:59:59,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:59:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:59:59,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:59:59,072 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:59:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:59,152 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-06-05 13:59:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 13:59:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:59,156 INFO L225 Difference]: With dead ends: 5002 [2021-06-05 13:59:59,157 INFO L226 Difference]: Without dead ends: 5002 [2021-06-05 13:59:59,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-06-05 13:59:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-06-05 13:59:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-06-05 13:59:59,208 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-06-05 13:59:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:59,208 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-06-05 13:59:59,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:59:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-06-05 13:59:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:59:59,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:59,211 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:59,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9860 [2021-06-05 13:59:59,412 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-06-05 13:59:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:59,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089212642] [2021-06-05 13:59:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:59,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:59,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089212642] [2021-06-05 13:59:59,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089212642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:59,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637096797] [2021-06-05 13:59:59,486 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 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 [2021-06-05 13:59:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:59:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:59,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637096797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:59,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:59,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:59:59,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322184289] [2021-06-05 13:59:59,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:59:59,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:59:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:59:59,557 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:59:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:59,735 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-06-05 13:59:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:59:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 13:59:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:59,740 INFO L225 Difference]: With dead ends: 4827 [2021-06-05 13:59:59,740 INFO L226 Difference]: Without dead ends: 4825 [2021-06-05 13:59:59,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-06-05 13:59:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-06-05 13:59:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-06-05 13:59:59,789 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-06-05 13:59:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:59,789 INFO L482 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-06-05 13:59:59,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 13:59:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-06-05 13:59:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:59:59,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:59,793 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:59,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9861,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:59,993 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:59,994 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-06-05 13:59:59,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:59,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949971587] [2021-06-05 13:59:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:00,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:00,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949971587] [2021-06-05 14:00:00,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949971587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010804029] [2021-06-05 14:00:00,053 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 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 [2021-06-05 14:00:00,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:00,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010804029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:00,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:00,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824695962] [2021-06-05 14:00:00,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:00,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:00,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:00,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:00,125 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:00,192 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-06-05 14:00:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:00,197 INFO L225 Difference]: With dead ends: 5088 [2021-06-05 14:00:00,197 INFO L226 Difference]: Without dead ends: 5088 [2021-06-05 14:00:00,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-06-05 14:00:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-06-05 14:00:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-06-05 14:00:00,249 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-06-05 14:00:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:00,249 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-06-05 14:00:00,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-06-05 14:00:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:00,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:00,253 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:00,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9862 [2021-06-05 14:00:00,454 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-06-05 14:00:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:00,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177697703] [2021-06-05 14:00:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:00,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177697703] [2021-06-05 14:00:00,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177697703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798306040] [2021-06-05 14:00:00,532 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 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 [2021-06-05 14:00:00,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:00:00,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:00,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:00,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798306040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:00,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:00:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590275546] [2021-06-05 14:00:00,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:00,614 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:00,701 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-06-05 14:00:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:00,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:00,706 INFO L225 Difference]: With dead ends: 5431 [2021-06-05 14:00:00,706 INFO L226 Difference]: Without dead ends: 5431 [2021-06-05 14:00:00,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-06-05 14:00:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-06-05 14:00:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-06-05 14:00:00,758 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-06-05 14:00:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:00,758 INFO L482 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-06-05 14:00:00,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-06-05 14:00:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:00,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:00,761 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:00,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9863 [2021-06-05 14:00:00,962 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-06-05 14:00:00,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:00,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710163347] [2021-06-05 14:00:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:01,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710163347] [2021-06-05 14:00:01,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710163347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427081192] [2021-06-05 14:00:01,020 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 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 [2021-06-05 14:00:01,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:01,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:01,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427081192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:01,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:01,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389712750] [2021-06-05 14:00:01,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:01,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:01,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:01,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:01,079 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:01,231 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-06-05 14:00:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:01,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:01,237 INFO L225 Difference]: With dead ends: 4816 [2021-06-05 14:00:01,237 INFO L226 Difference]: Without dead ends: 4814 [2021-06-05 14:00:01,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-06-05 14:00:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-06-05 14:00:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-06-05 14:00:01,294 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-06-05 14:00:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:01,294 INFO L482 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-06-05 14:00:01,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-06-05 14:00:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:01,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:01,299 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:01,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9864,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:01,499 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-06-05 14:00:01,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:01,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866023620] [2021-06-05 14:00:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:01,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866023620] [2021-06-05 14:00:01,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866023620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535242903] [2021-06-05 14:00:01,558 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 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 [2021-06-05 14:00:01,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:00:01,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:01,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535242903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:01,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512465107] [2021-06-05 14:00:01,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:01,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:01,625 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:01,698 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-06-05 14:00:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:01,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:01,703 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 14:00:01,703 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 14:00:01,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 14:00:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-06-05 14:00:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-06-05 14:00:01,764 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-06-05 14:00:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:01,764 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-06-05 14:00:01,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-06-05 14:00:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:01,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:01,768 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:01,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9865 [2021-06-05 14:00:01,969 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-06-05 14:00:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449443476] [2021-06-05 14:00:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:02,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449443476] [2021-06-05 14:00:02,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449443476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193830356] [2021-06-05 14:00:02,031 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 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 [2021-06-05 14:00:02,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:00:02,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193830356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:02,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:00:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847433306] [2021-06-05 14:00:02,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:02,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:02,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:02,117 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:02,222 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-06-05 14:00:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:02,228 INFO L225 Difference]: With dead ends: 5624 [2021-06-05 14:00:02,228 INFO L226 Difference]: Without dead ends: 5624 [2021-06-05 14:00:02,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-06-05 14:00:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-06-05 14:00:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-06-05 14:00:02,295 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-06-05 14:00:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:02,295 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-06-05 14:00:02,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-06-05 14:00:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:02,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:02,299 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:02,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9866,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:02,500 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-06-05 14:00:02,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:02,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344499880] [2021-06-05 14:00:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:02,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344499880] [2021-06-05 14:00:02,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344499880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626146400] [2021-06-05 14:00:02,573 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 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 [2021-06-05 14:00:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:02,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626146400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:02,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:00:02,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294169463] [2021-06-05 14:00:02,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:02,647 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:02,768 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-06-05 14:00:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:02,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:02,778 INFO L225 Difference]: With dead ends: 7402 [2021-06-05 14:00:02,779 INFO L226 Difference]: Without dead ends: 7402 [2021-06-05 14:00:02,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-06-05 14:00:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-06-05 14:00:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-06-05 14:00:02,872 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-06-05 14:00:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:02,872 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-06-05 14:00:02,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-06-05 14:00:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:02,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:02,877 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9867 [2021-06-05 14:00:03,078 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-06-05 14:00:03,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:03,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139263369] [2021-06-05 14:00:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:03,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:03,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139263369] [2021-06-05 14:00:03,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139263369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951528472] [2021-06-05 14:00:03,136 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 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 [2021-06-05 14:00:03,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:03,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:03,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951528472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:03,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:03,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36759266] [2021-06-05 14:00:03,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:03,201 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:03,368 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-06-05 14:00:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:03,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:03,377 INFO L225 Difference]: With dead ends: 6467 [2021-06-05 14:00:03,377 INFO L226 Difference]: Without dead ends: 6465 [2021-06-05 14:00:03,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-06-05 14:00:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-06-05 14:00:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-06-05 14:00:03,473 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-06-05 14:00:03,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:03,474 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-06-05 14:00:03,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-06-05 14:00:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:03,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:03,480 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:03,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9868,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:03,680 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-06-05 14:00:03,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:03,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038191383] [2021-06-05 14:00:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:03,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:03,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038191383] [2021-06-05 14:00:03,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038191383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839051846] [2021-06-05 14:00:03,743 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 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 [2021-06-05 14:00:03,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:00:03,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:03,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:03,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:03,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839051846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:03,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:03,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134084445] [2021-06-05 14:00:03,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:03,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:03,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:03,810 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:03,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:03,881 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-06-05 14:00:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:03,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:03,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:03,889 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 14:00:03,889 INFO L226 Difference]: Without dead ends: 6454 [2021-06-05 14:00:03,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-06-05 14:00:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-06-05 14:00:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-06-05 14:00:03,969 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-06-05 14:00:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:03,969 INFO L482 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-06-05 14:00:03,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-06-05 14:00:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:03,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:03,974 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:04,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9869,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:04,175 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:04,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:04,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-06-05 14:00:04,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:04,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314618565] [2021-06-05 14:00:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:04,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314618565] [2021-06-05 14:00:04,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314618565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609755189] [2021-06-05 14:00:04,247 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 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 [2021-06-05 14:00:04,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:04,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:04,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:04,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609755189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:04,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:04,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912729847] [2021-06-05 14:00:04,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:04,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:04,314 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:04,405 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-06-05 14:00:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:04,413 INFO L225 Difference]: With dead ends: 7159 [2021-06-05 14:00:04,413 INFO L226 Difference]: Without dead ends: 7159 [2021-06-05 14:00:04,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-06-05 14:00:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-06-05 14:00:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-06-05 14:00:04,496 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-06-05 14:00:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:04,496 INFO L482 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-06-05 14:00:04,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-06-05 14:00:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:04,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:04,501 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:04,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:04,702 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-06-05 14:00:04,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:04,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820588706] [2021-06-05 14:00:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820588706] [2021-06-05 14:00:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820588706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131042133] [2021-06-05 14:00:04,767 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 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 [2021-06-05 14:00:04,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:00:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:04,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131042133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:04,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:04,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295298112] [2021-06-05 14:00:04,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:04,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:04,834 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:04,937 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-06-05 14:00:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:04,949 INFO L225 Difference]: With dead ends: 10072 [2021-06-05 14:00:04,949 INFO L226 Difference]: Without dead ends: 10072 [2021-06-05 14:00:04,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-06-05 14:00:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-06-05 14:00:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-06-05 14:00:05,089 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-06-05 14:00:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:05,089 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-06-05 14:00:05,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-06-05 14:00:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:05,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:05,101 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:05,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9871,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:05,305 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:05,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-06-05 14:00:05,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:05,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851300912] [2021-06-05 14:00:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:05,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:05,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851300912] [2021-06-05 14:00:05,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851300912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635277563] [2021-06-05 14:00:05,376 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 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 [2021-06-05 14:00:05,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:00:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:05,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635277563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:05,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:05,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382336083] [2021-06-05 14:00:05,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:05,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:05,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:05,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:05,444 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:05,615 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-06-05 14:00:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:05,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:05,637 INFO L225 Difference]: With dead ends: 13143 [2021-06-05 14:00:05,637 INFO L226 Difference]: Without dead ends: 13143 [2021-06-05 14:00:05,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-06-05 14:00:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-06-05 14:00:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-06-05 14:00:05,896 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-06-05 14:00:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:05,896 INFO L482 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-06-05 14:00:05,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-06-05 14:00:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:05,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:05,905 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:06,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9872 [2021-06-05 14:00:06,106 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-06-05 14:00:06,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:06,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480587345] [2021-06-05 14:00:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:00:06,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:06,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480587345] [2021-06-05 14:00:06,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480587345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547222334] [2021-06-05 14:00:06,156 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 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 [2021-06-05 14:00:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:06,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:00:06,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547222334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:06,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:00:06,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354245703] [2021-06-05 14:00:06,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:06,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:06,225 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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) [2021-06-05 14:00:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:06,393 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-06-05 14:00:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 22 [2021-06-05 14:00:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:06,411 INFO L225 Difference]: With dead ends: 12000 [2021-06-05 14:00:06,411 INFO L226 Difference]: Without dead ends: 11996 [2021-06-05 14:00:06,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-06-05 14:00:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-06-05 14:00:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-06-05 14:00:06,585 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-06-05 14:00:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:06,586 INFO L482 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-06-05 14:00:06,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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) [2021-06-05 14:00:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-06-05 14:00:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:06,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:06,596 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:06,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9873 [2021-06-05 14:00:06,796 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-06-05 14:00:06,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:06,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141386357] [2021-06-05 14:00:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:06,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:06,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141386357] [2021-06-05 14:00:06,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141386357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609395910] [2021-06-05 14:00:06,861 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 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 [2021-06-05 14:00:06,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:06,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:06,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:06,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609395910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:06,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:06,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937324310] [2021-06-05 14:00:06,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:06,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:06,926 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 14:00:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:07,063 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-06-05 14:00:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 22 [2021-06-05 14:00:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:07,086 INFO L225 Difference]: With dead ends: 14397 [2021-06-05 14:00:07,086 INFO L226 Difference]: Without dead ends: 14397 [2021-06-05 14:00:07,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-06-05 14:00:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-06-05 14:00:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-06-05 14:00:07,320 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-06-05 14:00:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:07,320 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-06-05 14:00:07,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 14:00:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-06-05 14:00:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:07,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:07,330 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:07,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9874,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:07,531 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-06-05 14:00:07,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:07,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741637992] [2021-06-05 14:00:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:07,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741637992] [2021-06-05 14:00:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741637992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551049826] [2021-06-05 14:00:07,610 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 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 [2021-06-05 14:00:07,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:00:07,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:07,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551049826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:07,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:07,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:07,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514748863] [2021-06-05 14:00:07,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:07,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:07,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:07,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:07,693 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:07,840 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-06-05 14:00:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:07,862 INFO L225 Difference]: With dead ends: 15242 [2021-06-05 14:00:07,863 INFO L226 Difference]: Without dead ends: 15242 [2021-06-05 14:00:07,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-06-05 14:00:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-06-05 14:00:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-06-05 14:00:08,018 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-06-05 14:00:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:08,018 INFO L482 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-06-05 14:00:08,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-06-05 14:00:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:08,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:08,024 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:08,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9875 [2021-06-05 14:00:08,225 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-06-05 14:00:08,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:08,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615613938] [2021-06-05 14:00:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:08,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615613938] [2021-06-05 14:00:08,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615613938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522202260] [2021-06-05 14:00:08,293 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 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 [2021-06-05 14:00:08,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522202260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:08,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:08,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134130343] [2021-06-05 14:00:08,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:08,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:08,380 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:08,549 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-06-05 14:00:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:08,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:08,561 INFO L225 Difference]: With dead ends: 9785 [2021-06-05 14:00:08,561 INFO L226 Difference]: Without dead ends: 9785 [2021-06-05 14:00:08,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-06-05 14:00:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-06-05 14:00:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-06-05 14:00:08,669 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-06-05 14:00:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:08,669 INFO L482 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-06-05 14:00:08,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-06-05 14:00:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:08,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:08,675 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:08,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9876,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:08,875 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:08,875 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-06-05 14:00:08,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:08,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339479122] [2021-06-05 14:00:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:08,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339479122] [2021-06-05 14:00:08,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339479122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391947403] [2021-06-05 14:00:08,929 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 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 [2021-06-05 14:00:08,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:00:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:08,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391947403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:08,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:08,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264530772] [2021-06-05 14:00:08,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:08,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:08,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:08,994 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:09,173 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-06-05 14:00:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:09,180 INFO L225 Difference]: With dead ends: 6765 [2021-06-05 14:00:09,181 INFO L226 Difference]: Without dead ends: 6761 [2021-06-05 14:00:09,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-06-05 14:00:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-06-05 14:00:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-06-05 14:00:09,264 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-06-05 14:00:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:09,264 INFO L482 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-06-05 14:00:09,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-06-05 14:00:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:09,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:09,270 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:09,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9877 [2021-06-05 14:00:09,470 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-06-05 14:00:09,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:09,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195645334] [2021-06-05 14:00:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:09,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:09,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195645334] [2021-06-05 14:00:09,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195645334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:09,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571314885] [2021-06-05 14:00:09,527 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 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 [2021-06-05 14:00:09,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:00:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:09,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571314885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:09,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:09,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319479428] [2021-06-05 14:00:09,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:09,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:09,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:09,624 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:09,724 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-06-05 14:00:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:09,738 INFO L225 Difference]: With dead ends: 6899 [2021-06-05 14:00:09,738 INFO L226 Difference]: Without dead ends: 6899 [2021-06-05 14:00:09,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-05 14:00:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-06-05 14:00:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-06-05 14:00:09,868 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-06-05 14:00:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:09,868 INFO L482 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-06-05 14:00:09,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-06-05 14:00:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:09,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:09,876 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:10,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9878,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:10,100 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:10,101 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-06-05 14:00:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:10,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316030788] [2021-06-05 14:00:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:10,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:10,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316030788] [2021-06-05 14:00:10,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316030788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:10,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129714696] [2021-06-05 14:00:10,160 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 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 [2021-06-05 14:00:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:10,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129714696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:10,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:10,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:00:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383246081] [2021-06-05 14:00:10,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:10,237 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:10,332 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-06-05 14:00:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:10,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:10,340 INFO L225 Difference]: With dead ends: 6620 [2021-06-05 14:00:10,340 INFO L226 Difference]: Without dead ends: 6620 [2021-06-05 14:00:10,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-06-05 14:00:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-06-05 14:00:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-06-05 14:00:10,431 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-06-05 14:00:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:10,431 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-06-05 14:00:10,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-06-05 14:00:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:10,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:10,438 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:10,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9879,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:10,639 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-06-05 14:00:10,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:10,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498247995] [2021-06-05 14:00:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:10,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498247995] [2021-06-05 14:00:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498247995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469381785] [2021-06-05 14:00:10,702 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 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 [2021-06-05 14:00:10,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:10,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:10,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469381785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:10,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:10,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:10,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428675560] [2021-06-05 14:00:10,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:10,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:10,774 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:10,888 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-06-05 14:00:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:10,899 INFO L225 Difference]: With dead ends: 7662 [2021-06-05 14:00:10,899 INFO L226 Difference]: Without dead ends: 7662 [2021-06-05 14:00:10,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-06-05 14:00:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-06-05 14:00:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-06-05 14:00:11,000 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-06-05 14:00:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:11,000 INFO L482 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-06-05 14:00:11,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-06-05 14:00:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:11,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:11,007 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:11,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9880,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:11,207 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:11,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-06-05 14:00:11,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:11,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809279693] [2021-06-05 14:00:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:11,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:11,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809279693] [2021-06-05 14:00:11,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809279693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:11,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644307781] [2021-06-05 14:00:11,275 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 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 [2021-06-05 14:00:11,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:00:11,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:11,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644307781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:11,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:11,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:11,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822697334] [2021-06-05 14:00:11,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:11,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:11,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:11,353 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:11,498 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-06-05 14:00:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:11,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:11,513 INFO L225 Difference]: With dead ends: 9995 [2021-06-05 14:00:11,513 INFO L226 Difference]: Without dead ends: 9995 [2021-06-05 14:00:11,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-06-05 14:00:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-06-05 14:00:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-06-05 14:00:11,643 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-06-05 14:00:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:11,644 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-06-05 14:00:11,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-06-05 14:00:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:11,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:11,650 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:11,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9881 [2021-06-05 14:00:11,851 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-06-05 14:00:11,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:11,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98360454] [2021-06-05 14:00:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:11,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:11,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98360454] [2021-06-05 14:00:11,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98360454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:11,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029698606] [2021-06-05 14:00:11,922 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 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 [2021-06-05 14:00:11,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:11,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:12,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029698606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:12,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:12,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:12,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367329545] [2021-06-05 14:00:12,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:12,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:12,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:12,038 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:12,256 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-06-05 14:00:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:12,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:12,273 INFO L225 Difference]: With dead ends: 11660 [2021-06-05 14:00:12,274 INFO L226 Difference]: Without dead ends: 11660 [2021-06-05 14:00:12,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:00:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-06-05 14:00:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-06-05 14:00:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-06-05 14:00:12,438 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-06-05 14:00:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:12,438 INFO L482 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-06-05 14:00:12,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-06-05 14:00:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:12,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:12,447 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:12,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9882,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:12,647 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:12,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:12,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-06-05 14:00:12,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:12,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051169603] [2021-06-05 14:00:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:00:12,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:12,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051169603] [2021-06-05 14:00:12,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051169603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:12,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951013485] [2021-06-05 14:00:12,693 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 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 [2021-06-05 14:00:12,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:00:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:00:12,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951013485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:12,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:12,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:00:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421322160] [2021-06-05 14:00:12,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:12,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:12,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:12,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:12,761 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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) [2021-06-05 14:00:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:12,918 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-06-05 14:00:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:12,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 22 [2021-06-05 14:00:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:12,930 INFO L225 Difference]: With dead ends: 9612 [2021-06-05 14:00:12,930 INFO L226 Difference]: Without dead ends: 9608 [2021-06-05 14:00:12,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-06-05 14:00:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-06-05 14:00:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-06-05 14:00:13,064 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-06-05 14:00:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:13,064 INFO L482 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-06-05 14:00:13,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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) [2021-06-05 14:00:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-06-05 14:00:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:13,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:13,073 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:13,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9883 [2021-06-05 14:00:13,274 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-06-05 14:00:13,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:13,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397966543] [2021-06-05 14:00:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:13,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:13,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397966543] [2021-06-05 14:00:13,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397966543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:13,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402323801] [2021-06-05 14:00:13,336 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 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 [2021-06-05 14:00:13,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:00:13,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:13,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:13,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402323801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:13,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:13,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:13,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616511515] [2021-06-05 14:00:13,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:13,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:13,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:13,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:13,404 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:13,566 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-06-05 14:00:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:13,585 INFO L225 Difference]: With dead ends: 12460 [2021-06-05 14:00:13,586 INFO L226 Difference]: Without dead ends: 12460 [2021-06-05 14:00:13,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-06-05 14:00:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-06-05 14:00:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-06-05 14:00:13,745 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-06-05 14:00:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:13,745 INFO L482 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-06-05 14:00:13,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-06-05 14:00:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:13,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:13,754 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:13,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9884 [2021-06-05 14:00:13,954 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-06-05 14:00:13,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:13,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798253497] [2021-06-05 14:00:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:14,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798253497] [2021-06-05 14:00:14,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798253497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862325453] [2021-06-05 14:00:14,016 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 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 [2021-06-05 14:00:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862325453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:14,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:14,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70005451] [2021-06-05 14:00:14,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:14,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:14,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:14,089 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:14,249 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-06-05 14:00:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:14,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:14,270 INFO L225 Difference]: With dead ends: 12909 [2021-06-05 14:00:14,271 INFO L226 Difference]: Without dead ends: 12909 [2021-06-05 14:00:14,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-06-05 14:00:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-06-05 14:00:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-06-05 14:00:14,403 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-06-05 14:00:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:14,403 INFO L482 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-06-05 14:00:14,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-06-05 14:00:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:14,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:14,408 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:14,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9885 [2021-06-05 14:00:14,609 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-06-05 14:00:14,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:14,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631266335] [2021-06-05 14:00:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:14,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631266335] [2021-06-05 14:00:14,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631266335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111871343] [2021-06-05 14:00:14,686 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 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 [2021-06-05 14:00:14,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:14,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111871343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:14,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:14,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053798259] [2021-06-05 14:00:14,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:14,779 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:15,017 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-06-05 14:00:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:15,035 INFO L225 Difference]: With dead ends: 9798 [2021-06-05 14:00:15,036 INFO L226 Difference]: Without dead ends: 9798 [2021-06-05 14:00:15,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:00:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-06-05 14:00:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-06-05 14:00:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-06-05 14:00:15,186 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-06-05 14:00:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:15,187 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-06-05 14:00:15,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-06-05 14:00:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:15,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:15,194 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:15,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9886 [2021-06-05 14:00:15,409 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-06-05 14:00:15,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:15,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490293413] [2021-06-05 14:00:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:15,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:15,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490293413] [2021-06-05 14:00:15,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490293413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:15,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276569370] [2021-06-05 14:00:15,462 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 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 [2021-06-05 14:00:15,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:00:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:15,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276569370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:15,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:15,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:15,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733647976] [2021-06-05 14:00:15,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:15,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:15,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:15,527 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:15,687 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-06-05 14:00:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:15,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:15,695 INFO L225 Difference]: With dead ends: 6116 [2021-06-05 14:00:15,695 INFO L226 Difference]: Without dead ends: 6112 [2021-06-05 14:00:15,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-06-05 14:00:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-06-05 14:00:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-06-05 14:00:15,783 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-06-05 14:00:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:15,783 INFO L482 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-06-05 14:00:15,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-06-05 14:00:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:15,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:15,788 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:15,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9887 [2021-06-05 14:00:15,989 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-06-05 14:00:15,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:15,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174453930] [2021-06-05 14:00:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:16,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:16,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174453930] [2021-06-05 14:00:16,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174453930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:16,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515488025] [2021-06-05 14:00:16,042 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 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 [2021-06-05 14:00:16,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:16,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515488025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:16,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:16,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:16,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284041162] [2021-06-05 14:00:16,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:16,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:16,110 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:16,197 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-06-05 14:00:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:16,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:16,205 INFO L225 Difference]: With dead ends: 6374 [2021-06-05 14:00:16,205 INFO L226 Difference]: Without dead ends: 6374 [2021-06-05 14:00:16,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-06-05 14:00:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-06-05 14:00:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-06-05 14:00:16,289 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-06-05 14:00:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:16,289 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-06-05 14:00:16,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-06-05 14:00:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:16,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:16,294 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:16,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9888,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:16,494 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-06-05 14:00:16,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:16,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336316696] [2021-06-05 14:00:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:16,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:16,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336316696] [2021-06-05 14:00:16,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336316696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:16,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104761784] [2021-06-05 14:00:16,557 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 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 [2021-06-05 14:00:16,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:00:16,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104761784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:16,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:16,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:00:16,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878780642] [2021-06-05 14:00:16,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:16,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:16,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:16,645 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:16,742 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-06-05 14:00:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:16,751 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 14:00:16,752 INFO L226 Difference]: Without dead ends: 6454 [2021-06-05 14:00:16,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-06-05 14:00:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-06-05 14:00:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-06-05 14:00:16,833 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-06-05 14:00:16,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:16,833 INFO L482 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-06-05 14:00:16,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-06-05 14:00:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:16,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:16,838 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:17,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9889,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:17,038 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-06-05 14:00:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:17,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44922685] [2021-06-05 14:00:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:17,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:17,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44922685] [2021-06-05 14:00:17,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44922685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826375346] [2021-06-05 14:00:17,095 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 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 [2021-06-05 14:00:17,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:00:17,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:17,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826375346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:17,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:00:17,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311203921] [2021-06-05 14:00:17,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:17,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:17,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:17,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:17,169 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:17,267 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-06-05 14:00:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:17,281 INFO L225 Difference]: With dead ends: 9965 [2021-06-05 14:00:17,281 INFO L226 Difference]: Without dead ends: 9965 [2021-06-05 14:00:17,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-06-05 14:00:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-06-05 14:00:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-06-05 14:00:17,423 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-06-05 14:00:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:17,423 INFO L482 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-06-05 14:00:17,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-06-05 14:00:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:17,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:17,430 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:17,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9890,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:17,631 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-06-05 14:00:17,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:17,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724431658] [2021-06-05 14:00:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:17,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:17,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724431658] [2021-06-05 14:00:17,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724431658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452608477] [2021-06-05 14:00:17,695 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 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 [2021-06-05 14:00:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:17,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:17,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452608477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:17,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:17,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547655337] [2021-06-05 14:00:17,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:17,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:17,797 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:17,970 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-06-05 14:00:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:17,986 INFO L225 Difference]: With dead ends: 10632 [2021-06-05 14:00:17,986 INFO L226 Difference]: Without dead ends: 10632 [2021-06-05 14:00:17,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-06-05 14:00:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-06-05 14:00:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-06-05 14:00:18,146 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-06-05 14:00:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:18,146 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-06-05 14:00:18,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-06-05 14:00:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:18,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:18,152 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:18,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9891 [2021-06-05 14:00:18,353 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-06-05 14:00:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:18,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865199442] [2021-06-05 14:00:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:18,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:18,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865199442] [2021-06-05 14:00:18,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865199442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183570194] [2021-06-05 14:00:18,419 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 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 [2021-06-05 14:00:18,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:18,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:18,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:18,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183570194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:18,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:18,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801011252] [2021-06-05 14:00:18,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:18,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:18,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:18,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:18,491 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:18,680 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-06-05 14:00:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:18,705 INFO L225 Difference]: With dead ends: 14571 [2021-06-05 14:00:18,705 INFO L226 Difference]: Without dead ends: 14571 [2021-06-05 14:00:18,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:00:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-06-05 14:00:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-06-05 14:00:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-06-05 14:00:18,926 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-06-05 14:00:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:18,926 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-06-05 14:00:18,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-06-05 14:00:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:18,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:18,936 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:19,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9892 [2021-06-05 14:00:19,137 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-06-05 14:00:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:19,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70154986] [2021-06-05 14:00:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:19,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:19,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70154986] [2021-06-05 14:00:19,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70154986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:19,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566062001] [2021-06-05 14:00:19,224 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 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 [2021-06-05 14:00:19,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:00:19,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:19,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:19,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566062001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:19,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:19,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:00:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896379130] [2021-06-05 14:00:19,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:19,321 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:19,608 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-06-05 14:00:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:00:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:19,638 INFO L225 Difference]: With dead ends: 19456 [2021-06-05 14:00:19,638 INFO L226 Difference]: Without dead ends: 19456 [2021-06-05 14:00:19,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:00:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-06-05 14:00:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-06-05 14:00:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-06-05 14:00:19,933 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-06-05 14:00:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:19,934 INFO L482 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-06-05 14:00:19,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-06-05 14:00:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:19,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:19,944 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:20,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9893 [2021-06-05 14:00:20,145 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-06-05 14:00:20,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:20,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674172234] [2021-06-05 14:00:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:20,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:20,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674172234] [2021-06-05 14:00:20,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674172234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401803088] [2021-06-05 14:00:20,214 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 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 [2021-06-05 14:00:20,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:20,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:20,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401803088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:20,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:20,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704794253] [2021-06-05 14:00:20,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:20,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:20,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:20,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:20,280 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:20,524 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-06-05 14:00:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:00:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:20,565 INFO L225 Difference]: With dead ends: 24132 [2021-06-05 14:00:20,565 INFO L226 Difference]: Without dead ends: 24132 [2021-06-05 14:00:20,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:00:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-06-05 14:00:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-06-05 14:00:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-06-05 14:00:20,861 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-06-05 14:00:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:20,861 INFO L482 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-06-05 14:00:20,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-06-05 14:00:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:20,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:20,871 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:21,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:21,071 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:21,071 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-06-05 14:00:21,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:21,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001931154] [2021-06-05 14:00:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:21,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001931154] [2021-06-05 14:00:21,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001931154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172547593] [2021-06-05 14:00:21,140 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 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 [2021-06-05 14:00:21,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:00:21,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:21,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:21,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172547593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:21,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:21,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690626980] [2021-06-05 14:00:21,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:21,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:21,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:21,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:21,208 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:21,426 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-06-05 14:00:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:21,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:21,457 INFO L225 Difference]: With dead ends: 20948 [2021-06-05 14:00:21,457 INFO L226 Difference]: Without dead ends: 20948 [2021-06-05 14:00:21,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-06-05 14:00:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-06-05 14:00:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-06-05 14:00:21,790 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-06-05 14:00:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:21,790 INFO L482 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-06-05 14:00:21,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-06-05 14:00:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:21,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:21,800 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:22,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9895 [2021-06-05 14:00:22,001 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:22,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-06-05 14:00:22,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:22,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785710404] [2021-06-05 14:00:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:22,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785710404] [2021-06-05 14:00:22,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785710404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14716851] [2021-06-05 14:00:22,073 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 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 [2021-06-05 14:00:22,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:00:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:22,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:22,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14716851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:22,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:22,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:22,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635627321] [2021-06-05 14:00:22,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:22,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:22,141 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:22,450 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-06-05 14:00:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:00:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:22,497 INFO L225 Difference]: With dead ends: 28543 [2021-06-05 14:00:22,497 INFO L226 Difference]: Without dead ends: 28543 [2021-06-05 14:00:22,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:00:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-06-05 14:00:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-06-05 14:00:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-06-05 14:00:23,033 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-06-05 14:00:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:23,033 INFO L482 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-06-05 14:00:23,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-06-05 14:00:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:23,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:23,044 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9896 [2021-06-05 14:00:23,244 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-06-05 14:00:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481236614] [2021-06-05 14:00:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:23,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481236614] [2021-06-05 14:00:23,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481236614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835285010] [2021-06-05 14:00:23,306 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 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 [2021-06-05 14:00:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:23,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:23,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835285010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:23,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:23,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:23,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137865325] [2021-06-05 14:00:23,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:23,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:23,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:23,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:23,366 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:23,600 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-06-05 14:00:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:23,654 INFO L225 Difference]: With dead ends: 27245 [2021-06-05 14:00:23,655 INFO L226 Difference]: Without dead ends: 27241 [2021-06-05 14:00:23,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-06-05 14:00:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-06-05 14:00:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-06-05 14:00:24,150 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-06-05 14:00:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:24,150 INFO L482 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-06-05 14:00:24,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-06-05 14:00:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:24,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:24,161 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:24,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9897,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:24,362 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-06-05 14:00:24,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:24,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151110667] [2021-06-05 14:00:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:24,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151110667] [2021-06-05 14:00:24,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151110667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280660719] [2021-06-05 14:00:24,415 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 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 [2021-06-05 14:00:24,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:24,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:24,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:24,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:24,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280660719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:24,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:24,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392964515] [2021-06-05 14:00:24,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:24,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:24,482 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:24,653 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-06-05 14:00:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:00:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:24,705 INFO L225 Difference]: With dead ends: 27144 [2021-06-05 14:00:24,705 INFO L226 Difference]: Without dead ends: 27144 [2021-06-05 14:00:24,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-06-05 14:00:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-06-05 14:00:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-06-05 14:00:25,213 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-06-05 14:00:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:25,213 INFO L482 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-06-05 14:00:25,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:00:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-06-05 14:00:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:25,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:25,226 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:25,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9898 [2021-06-05 14:00:25,429 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-06-05 14:00:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:25,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645298340] [2021-06-05 14:00:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:25,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:25,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645298340] [2021-06-05 14:00:25,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645298340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648484395] [2021-06-05 14:00:25,487 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 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 [2021-06-05 14:00:25,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:00:25,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:25,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648484395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:25,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:25,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571557799] [2021-06-05 14:00:25,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:25,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:25,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:25,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:25,555 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:25,741 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-06-05 14:00:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:25,791 INFO L225 Difference]: With dead ends: 28314 [2021-06-05 14:00:25,791 INFO L226 Difference]: Without dead ends: 28314 [2021-06-05 14:00:25,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-06-05 14:00:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-06-05 14:00:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-06-05 14:00:26,279 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-06-05 14:00:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:26,279 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-06-05 14:00:26,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-06-05 14:00:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:26,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:26,289 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:26,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9899,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:26,490 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-06-05 14:00:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:26,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501508978] [2021-06-05 14:00:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:26,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501508978] [2021-06-05 14:00:26,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501508978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552150567] [2021-06-05 14:00:26,550 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 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 [2021-06-05 14:00:26,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:26,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:26,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:26,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552150567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:26,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:26,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:26,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381559401] [2021-06-05 14:00:26,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:26,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:26,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:26,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:26,619 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:26,845 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-06-05 14:00:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:26,932 INFO L225 Difference]: With dead ends: 40934 [2021-06-05 14:00:26,932 INFO L226 Difference]: Without dead ends: 40934 [2021-06-05 14:00:26,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-06-05 14:00:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-06-05 14:00:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-06-05 14:00:27,731 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-06-05 14:00:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:27,731 INFO L482 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-06-05 14:00:27,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-06-05 14:00:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:27,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:27,742 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:27,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9900,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:27,943 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-06-05 14:00:27,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:27,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104338920] [2021-06-05 14:00:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:28,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104338920] [2021-06-05 14:00:28,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104338920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790137343] [2021-06-05 14:00:28,004 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 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 [2021-06-05 14:00:28,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:00:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:28,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790137343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:28,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:28,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827131726] [2021-06-05 14:00:28,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:28,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:28,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:28,078 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:28,292 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-06-05 14:00:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:00:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:28,386 INFO L225 Difference]: With dead ends: 45762 [2021-06-05 14:00:28,387 INFO L226 Difference]: Without dead ends: 45762 [2021-06-05 14:00:28,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-06-05 14:00:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-06-05 14:00:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-06-05 14:00:29,281 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-06-05 14:00:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:29,281 INFO L482 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-06-05 14:00:29,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:00:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-06-05 14:00:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:29,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:29,298 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:29,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9901,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:29,498 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-06-05 14:00:29,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:29,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637056195] [2021-06-05 14:00:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:29,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637056195] [2021-06-05 14:00:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637056195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481320252] [2021-06-05 14:00:29,570 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 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 [2021-06-05 14:00:29,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:00:29,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:29,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481320252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:29,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:29,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660760243] [2021-06-05 14:00:29,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:29,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:29,638 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:29,910 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-06-05 14:00:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:30,002 INFO L225 Difference]: With dead ends: 46432 [2021-06-05 14:00:30,002 INFO L226 Difference]: Without dead ends: 46432 [2021-06-05 14:00:30,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-06-05 14:00:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-06-05 14:00:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-06-05 14:00:31,081 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-06-05 14:00:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:31,081 INFO L482 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-06-05 14:00:31,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-06-05 14:00:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:31,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:31,098 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:31,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9902,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:31,298 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-06-05 14:00:31,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:31,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653025227] [2021-06-05 14:00:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:31,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:31,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653025227] [2021-06-05 14:00:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653025227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94527957] [2021-06-05 14:00:31,369 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 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 [2021-06-05 14:00:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:31,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:31,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94527957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:31,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:31,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556964025] [2021-06-05 14:00:31,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:31,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:31,434 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:31,790 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-06-05 14:00:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:31,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:31,899 INFO L225 Difference]: With dead ends: 49791 [2021-06-05 14:00:31,899 INFO L226 Difference]: Without dead ends: 49791 [2021-06-05 14:00:31,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:00:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-06-05 14:00:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-06-05 14:00:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-06-05 14:00:33,403 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-06-05 14:00:33,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:33,403 INFO L482 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-06-05 14:00:33,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-06-05 14:00:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:33,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:33,426 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:33,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9903 [2021-06-05 14:00:33,626 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-06-05 14:00:33,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:33,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564238449] [2021-06-05 14:00:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564238449] [2021-06-05 14:00:33,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564238449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777363753] [2021-06-05 14:00:33,734 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 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 [2021-06-05 14:00:33,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:33,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:33,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:33,921 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 14:00:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777363753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:33,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:33,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949306422] [2021-06-05 14:00:33,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:33,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:33,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:33,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:33,963 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:34,518 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-06-05 14:00:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:00:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:34,653 INFO L225 Difference]: With dead ends: 52302 [2021-06-05 14:00:34,653 INFO L226 Difference]: Without dead ends: 52302 [2021-06-05 14:00:34,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:00:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-06-05 14:00:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-06-05 14:00:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-06-05 14:00:35,862 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-06-05 14:00:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:35,862 INFO L482 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-06-05 14:00:35,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-06-05 14:00:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:35,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:35,881 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:36,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9904,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:36,082 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-06-05 14:00:36,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:36,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345752052] [2021-06-05 14:00:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:36,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:36,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345752052] [2021-06-05 14:00:36,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345752052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126597780] [2021-06-05 14:00:36,143 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 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 [2021-06-05 14:00:36,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:00:36,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:36,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:36,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126597780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:36,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:36,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268302833] [2021-06-05 14:00:36,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:36,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:36,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:36,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:36,211 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 14:00:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:36,755 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-06-05 14:00:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:00:36,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 22 [2021-06-05 14:00:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:36,883 INFO L225 Difference]: With dead ends: 52382 [2021-06-05 14:00:36,883 INFO L226 Difference]: Without dead ends: 52376 [2021-06-05 14:00:36,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-06-05 14:00:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-06-05 14:00:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-06-05 14:00:38,153 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-06-05 14:00:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:38,153 INFO L482 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-06-05 14:00:38,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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) [2021-06-05 14:00:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-06-05 14:00:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:38,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:38,172 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:38,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9905 [2021-06-05 14:00:38,373 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-06-05 14:00:38,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437618036] [2021-06-05 14:00:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:38,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:38,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437618036] [2021-06-05 14:00:38,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437618036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075576634] [2021-06-05 14:00:38,430 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 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 [2021-06-05 14:00:38,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:38,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075576634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:38,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:00:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46278173] [2021-06-05 14:00:38,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:00:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:00:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:38,495 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 14:00:38,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:38,998 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-06-05 14:00:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:38,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 22 [2021-06-05 14:00:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:39,168 INFO L225 Difference]: With dead ends: 71897 [2021-06-05 14:00:39,168 INFO L226 Difference]: Without dead ends: 71897 [2021-06-05 14:00:39,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-06-05 14:00:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-06-05 14:00:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-06-05 14:00:41,091 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-06-05 14:00:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:41,091 INFO L482 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-06-05 14:00:41,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 14:00:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-06-05 14:00:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:41,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:41,111 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:41,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9906,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:41,311 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-06-05 14:00:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:41,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499222682] [2021-06-05 14:00:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:41,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499222682] [2021-06-05 14:00:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499222682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194815179] [2021-06-05 14:00:41,383 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 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 [2021-06-05 14:00:41,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:00:41,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:41,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194815179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:41,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:41,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697668476] [2021-06-05 14:00:41,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:41,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:41,452 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:00:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:42,134 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-06-05 14:00:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 22 [2021-06-05 14:00:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:42,322 INFO L225 Difference]: With dead ends: 81568 [2021-06-05 14:00:42,323 INFO L226 Difference]: Without dead ends: 81568 [2021-06-05 14:00:42,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-06-05 14:00:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-06-05 14:00:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-06-05 14:00:44,208 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-06-05 14:00:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:44,208 INFO L482 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-06-05 14:00:44,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:00:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-06-05 14:00:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:44,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:44,229 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:44,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9907,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:44,430 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:44,430 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-06-05 14:00:44,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:44,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123466667] [2021-06-05 14:00:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:44,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123466667] [2021-06-05 14:00:44,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123466667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370028106] [2021-06-05 14:00:44,504 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 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 [2021-06-05 14:00:44,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:00:44,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:44,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370028106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:44,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282043881] [2021-06-05 14:00:44,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:44,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:44,584 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:00:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:45,623 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-06-05 14:00:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 22 [2021-06-05 14:00:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:45,885 INFO L225 Difference]: With dead ends: 104720 [2021-06-05 14:00:45,885 INFO L226 Difference]: Without dead ends: 104720 [2021-06-05 14:00:45,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-06-05 14:00:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-06-05 14:00:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-06-05 14:00:48,273 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-06-05 14:00:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:48,273 INFO L482 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-06-05 14:00:48,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:00:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-06-05 14:00:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:48,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:48,301 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9908 [2021-06-05 14:00:48,501 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-06-05 14:00:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212349167] [2021-06-05 14:00:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212349167] [2021-06-05 14:00:48,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212349167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195036339] [2021-06-05 14:00:48,599 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 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 [2021-06-05 14:00:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:48,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195036339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:48,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:00:48,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277667237] [2021-06-05 14:00:48,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:00:48,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:00:48,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:48,672 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:00:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:49,884 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-06-05 14:00:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:00:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 22 [2021-06-05 14:00:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:50,219 INFO L225 Difference]: With dead ends: 122524 [2021-06-05 14:00:50,219 INFO L226 Difference]: Without dead ends: 122524 [2021-06-05 14:00:50,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:00:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-06-05 14:00:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-06-05 14:00:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-06-05 14:00:53,637 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-06-05 14:00:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:53,637 INFO L482 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-06-05 14:00:53,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:00:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-06-05 14:00:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:53,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:53,660 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:53,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9909,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:53,861 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-06-05 14:00:53,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:53,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852577274] [2021-06-05 14:00:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:53,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852577274] [2021-06-05 14:00:53,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852577274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212250911] [2021-06-05 14:00:53,936 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 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 [2021-06-05 14:00:53,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:53,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:53,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212250911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:54,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:54,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911929706] [2021-06-05 14:00:54,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:54,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:54,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:54,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:54,009 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:54,846 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-06-05 14:00:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:54,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:55,256 INFO L225 Difference]: With dead ends: 149360 [2021-06-05 14:00:55,256 INFO L226 Difference]: Without dead ends: 149360 [2021-06-05 14:00:55,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-06-05 14:00:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-06-05 14:00:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-06-05 14:00:57,925 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-06-05 14:00:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:57,926 INFO L482 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-06-05 14:00:57,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-06-05 14:00:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:00:57,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:57,947 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:58,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9910,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:58,147 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:58,148 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-06-05 14:00:58,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:58,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401093175] [2021-06-05 14:00:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401093175] [2021-06-05 14:00:58,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401093175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685401904] [2021-06-05 14:00:58,219 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 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 [2021-06-05 14:00:58,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:58,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:00:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685401904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:58,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:00:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839779760] [2021-06-05 14:00:58,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:58,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:58,287 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:00:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:59,174 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-06-05 14:00:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:00:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:00:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:59,392 INFO L225 Difference]: With dead ends: 89497 [2021-06-05 14:00:59,392 INFO L226 Difference]: Without dead ends: 89497 [2021-06-05 14:00:59,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 233.5ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:00:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-06-05 14:01:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-06-05 14:01:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-06-05 14:01:01,000 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-06-05 14:01:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:01,000 INFO L482 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-06-05 14:01:01,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-06-05 14:01:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:01,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:01,016 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:01,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9911,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:01,217 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-06-05 14:01:01,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:01,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429548907] [2021-06-05 14:01:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:01,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:01,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429548907] [2021-06-05 14:01:01,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429548907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:01,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456512059] [2021-06-05 14:01:01,285 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 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 [2021-06-05 14:01:01,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:01,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:01,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:01,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:01,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456512059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:01,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:01,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:01:01,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609866111] [2021-06-05 14:01:01,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:01:01,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:01,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:01:01,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:01:01,358 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:01,644 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-06-05 14:01:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:01:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:01:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:01,747 INFO L225 Difference]: With dead ends: 46015 [2021-06-05 14:01:01,747 INFO L226 Difference]: Without dead ends: 46015 [2021-06-05 14:01:01,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-06-05 14:01:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-06-05 14:01:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-06-05 14:01:02,706 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-06-05 14:01:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:02,706 INFO L482 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-06-05 14:01:02,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-06-05 14:01:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:02,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:02,717 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:02,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9912,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:02,917 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:02,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-06-05 14:01:02,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:02,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426280466] [2021-06-05 14:01:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:02,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:02,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426280466] [2021-06-05 14:01:02,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426280466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:02,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139668696] [2021-06-05 14:01:02,980 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 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 [2021-06-05 14:01:03,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:01:03,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:03,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:03,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139668696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:03,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:03,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:01:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576354443] [2021-06-05 14:01:03,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:01:03,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:01:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:01:03,047 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:03,238 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-06-05 14:01:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:01:03,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:01:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:03,308 INFO L225 Difference]: With dead ends: 35745 [2021-06-05 14:01:03,308 INFO L226 Difference]: Without dead ends: 35745 [2021-06-05 14:01:03,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:01:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-06-05 14:01:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-06-05 14:01:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-06-05 14:01:04,173 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-06-05 14:01:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:04,173 INFO L482 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-06-05 14:01:04,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-06-05 14:01:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:04,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:04,185 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:04,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9913,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:04,386 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-06-05 14:01:04,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:04,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270082754] [2021-06-05 14:01:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:04,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:04,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270082754] [2021-06-05 14:01:04,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270082754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:04,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974827091] [2021-06-05 14:01:04,457 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 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 [2021-06-05 14:01:04,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:01:04,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:04,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974827091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:04,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:04,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:01:04,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9863279] [2021-06-05 14:01:04,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:04,524 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:04,764 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-06-05 14:01:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:01:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:04,832 INFO L225 Difference]: With dead ends: 36167 [2021-06-05 14:01:04,832 INFO L226 Difference]: Without dead ends: 36167 [2021-06-05 14:01:04,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-06-05 14:01:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-06-05 14:01:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-06-05 14:01:05,565 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-06-05 14:01:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:05,566 INFO L482 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-06-05 14:01:05,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-06-05 14:01:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:05,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:05,576 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:05,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9914,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:05,777 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-06-05 14:01:05,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:05,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818973017] [2021-06-05 14:01:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:05,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:05,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818973017] [2021-06-05 14:01:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818973017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:05,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177145444] [2021-06-05 14:01:05,849 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 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 [2021-06-05 14:01:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:05,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:05,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177145444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:05,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:05,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:01:05,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114214095] [2021-06-05 14:01:05,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:05,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:05,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:05,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:05,915 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:06,205 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-06-05 14:01:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:06,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:06,273 INFO L225 Difference]: With dead ends: 36419 [2021-06-05 14:01:06,273 INFO L226 Difference]: Without dead ends: 36419 [2021-06-05 14:01:06,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:01:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-06-05 14:01:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-06-05 14:01:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-06-05 14:01:07,144 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-06-05 14:01:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:07,144 INFO L482 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-06-05 14:01:07,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-06-05 14:01:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:07,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:07,156 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:07,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9915 [2021-06-05 14:01:07,356 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-06-05 14:01:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:07,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772229875] [2021-06-05 14:01:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:07,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772229875] [2021-06-05 14:01:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772229875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756906235] [2021-06-05 14:01:07,433 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 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 [2021-06-05 14:01:07,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:07,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:07,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:07,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756906235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:07,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:07,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:01:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989417833] [2021-06-05 14:01:07,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:07,499 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:07,908 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-06-05 14:01:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:01:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:07,975 INFO L225 Difference]: With dead ends: 36428 [2021-06-05 14:01:07,975 INFO L226 Difference]: Without dead ends: 36428 [2021-06-05 14:01:07,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:01:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-06-05 14:01:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-06-05 14:01:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-06-05 14:01:08,682 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-06-05 14:01:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:08,682 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-06-05 14:01:08,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-06-05 14:01:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:08,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:08,694 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:08,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9916,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:08,894 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-06-05 14:01:08,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:08,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671912677] [2021-06-05 14:01:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:08,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:08,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671912677] [2021-06-05 14:01:08,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671912677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:08,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334769248] [2021-06-05 14:01:08,949 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 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 [2021-06-05 14:01:08,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:01:08,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:08,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:01:09,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334769248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:09,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:09,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:01:09,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208383832] [2021-06-05 14:01:09,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:01:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:01:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:01:09,013 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 14:01:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:09,284 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-06-05 14:01:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:09,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-06-05 14:01:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:09,353 INFO L225 Difference]: With dead ends: 34348 [2021-06-05 14:01:09,354 INFO L226 Difference]: Without dead ends: 34344 [2021-06-05 14:01:09,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-06-05 14:01:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-06-05 14:01:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-06-05 14:01:10,077 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-06-05 14:01:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:10,077 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-06-05 14:01:10,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-06-05 14:01:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-06-05 14:01:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:10,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:10,088 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:10,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9917 [2021-06-05 14:01:10,288 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-06-05 14:01:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:10,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195146569] [2021-06-05 14:01:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:10,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:10,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195146569] [2021-06-05 14:01:10,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195146569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:10,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712979057] [2021-06-05 14:01:10,362 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 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 [2021-06-05 14:01:10,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:10,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712979057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:10,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:10,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:10,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578200996] [2021-06-05 14:01:10,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:10,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:10,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:10,437 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:10,784 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-06-05 14:01:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:01:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:10,855 INFO L225 Difference]: With dead ends: 37342 [2021-06-05 14:01:10,855 INFO L226 Difference]: Without dead ends: 37342 [2021-06-05 14:01:10,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:01:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-06-05 14:01:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-06-05 14:01:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-06-05 14:01:11,601 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-06-05 14:01:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:11,601 INFO L482 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-06-05 14:01:11,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-06-05 14:01:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:11,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:11,611 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:11,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9918 [2021-06-05 14:01:11,812 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-06-05 14:01:11,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:11,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405713656] [2021-06-05 14:01:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:11,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405713656] [2021-06-05 14:01:11,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405713656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055789058] [2021-06-05 14:01:11,885 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 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 [2021-06-05 14:01:11,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:11,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055789058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:11,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:11,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:11,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876239505] [2021-06-05 14:01:11,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:11,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:11,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:11,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:11,958 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:12,240 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-06-05 14:01:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:01:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:12,300 INFO L225 Difference]: With dead ends: 32697 [2021-06-05 14:01:12,300 INFO L226 Difference]: Without dead ends: 32697 [2021-06-05 14:01:12,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:01:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-06-05 14:01:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-06-05 14:01:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-06-05 14:01:13,039 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-06-05 14:01:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:13,039 INFO L482 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-06-05 14:01:13,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-06-05 14:01:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:13,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:13,048 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:13,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9919,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:13,250 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:13,250 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-06-05 14:01:13,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:13,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095381065] [2021-06-05 14:01:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:13,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:13,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095381065] [2021-06-05 14:01:13,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095381065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:13,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008266955] [2021-06-05 14:01:13,327 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 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 [2021-06-05 14:01:13,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:13,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008266955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:13,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:13,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:13,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322398753] [2021-06-05 14:01:13,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:13,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:13,402 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:13,821 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-06-05 14:01:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:01:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:13,881 INFO L225 Difference]: With dead ends: 33049 [2021-06-05 14:01:13,881 INFO L226 Difference]: Without dead ends: 33049 [2021-06-05 14:01:13,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:01:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-06-05 14:01:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-06-05 14:01:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-06-05 14:01:14,620 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-06-05 14:01:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:14,620 INFO L482 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-06-05 14:01:14,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-06-05 14:01:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:14,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:14,632 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:14,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9920 [2021-06-05 14:01:14,856 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-06-05 14:01:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:14,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5553668] [2021-06-05 14:01:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:14,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:14,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5553668] [2021-06-05 14:01:14,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5553668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602281896] [2021-06-05 14:01:14,911 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 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 [2021-06-05 14:01:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602281896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:14,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:14,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:01:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92842764] [2021-06-05 14:01:14,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:01:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:01:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:01:14,970 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:01:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:15,218 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-06-05 14:01:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:01:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:15,278 INFO L225 Difference]: With dead ends: 31092 [2021-06-05 14:01:15,278 INFO L226 Difference]: Without dead ends: 31088 [2021-06-05 14:01:15,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-06-05 14:01:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-06-05 14:01:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-06-05 14:01:15,920 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-06-05 14:01:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:15,920 INFO L482 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-06-05 14:01:15,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:01:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-06-05 14:01:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:15,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:15,930 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:16,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9921,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:16,131 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-06-05 14:01:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:16,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735478337] [2021-06-05 14:01:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:16,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:16,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735478337] [2021-06-05 14:01:16,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735478337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:16,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364458175] [2021-06-05 14:01:16,186 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 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 [2021-06-05 14:01:16,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:16,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:16,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364458175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:16,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:16,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:01:16,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491786770] [2021-06-05 14:01:16,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:01:16,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:16,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:01:16,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:01:16,253 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:01:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:16,447 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-06-05 14:01:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:01:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:01:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:16,512 INFO L225 Difference]: With dead ends: 31582 [2021-06-05 14:01:16,513 INFO L226 Difference]: Without dead ends: 31582 [2021-06-05 14:01:16,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:01:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-06-05 14:01:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-06-05 14:01:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-06-05 14:01:17,321 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-06-05 14:01:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:17,321 INFO L482 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-06-05 14:01:17,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:01:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-06-05 14:01:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:17,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:17,330 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:17,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9922,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:17,530 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-06-05 14:01:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:17,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151623563] [2021-06-05 14:01:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:17,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:17,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151623563] [2021-06-05 14:01:17,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151623563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:17,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461713202] [2021-06-05 14:01:17,587 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 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 [2021-06-05 14:01:17,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:01:17,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:17,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461713202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:17,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:17,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:01:17,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554784497] [2021-06-05 14:01:17,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:01:17,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:01:17,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:01:17,661 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:17,874 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-06-05 14:01:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:17,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:01:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:17,928 INFO L225 Difference]: With dead ends: 31896 [2021-06-05 14:01:17,928 INFO L226 Difference]: Without dead ends: 31896 [2021-06-05 14:01:17,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-06-05 14:01:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-06-05 14:01:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-06-05 14:01:18,457 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-06-05 14:01:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:18,457 INFO L482 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-06-05 14:01:18,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-06-05 14:01:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:18,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:18,466 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:18,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:18,667 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-06-05 14:01:18,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:18,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900260439] [2021-06-05 14:01:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:18,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:18,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900260439] [2021-06-05 14:01:18,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900260439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:18,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493945156] [2021-06-05 14:01:18,728 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 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 [2021-06-05 14:01:18,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:18,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:18,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:18,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493945156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:18,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:18,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:01:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960785169] [2021-06-05 14:01:18,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:18,800 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:19,261 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-06-05 14:01:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:19,331 INFO L225 Difference]: With dead ends: 31958 [2021-06-05 14:01:19,331 INFO L226 Difference]: Without dead ends: 31958 [2021-06-05 14:01:19,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-06-05 14:01:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-06-05 14:01:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-06-05 14:01:19,938 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-06-05 14:01:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:19,938 INFO L482 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-06-05 14:01:19,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-06-05 14:01:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:19,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:19,948 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:20,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9924,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:20,148 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:20,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-06-05 14:01:20,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:20,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371640106] [2021-06-05 14:01:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:20,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:20,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371640106] [2021-06-05 14:01:20,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371640106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:20,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762213388] [2021-06-05 14:01:20,212 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 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 [2021-06-05 14:01:20,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:01:20,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:20,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:20,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762213388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:20,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:20,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:01:20,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520335677] [2021-06-05 14:01:20,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:20,286 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:20,518 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-06-05 14:01:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:01:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:20,580 INFO L225 Difference]: With dead ends: 36047 [2021-06-05 14:01:20,580 INFO L226 Difference]: Without dead ends: 36047 [2021-06-05 14:01:20,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-06-05 14:01:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-06-05 14:01:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-06-05 14:01:21,317 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-06-05 14:01:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:21,317 INFO L482 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-06-05 14:01:21,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-06-05 14:01:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:21,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:21,327 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:21,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9925 [2021-06-05 14:01:21,527 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-06-05 14:01:21,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:21,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654451029] [2021-06-05 14:01:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:21,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:21,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654451029] [2021-06-05 14:01:21,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654451029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:21,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123109375] [2021-06-05 14:01:21,593 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 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 [2021-06-05 14:01:21,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:21,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123109375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:21,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:21,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:01:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183066545] [2021-06-05 14:01:21,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:21,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:21,667 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:21,885 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-06-05 14:01:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:01:21,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:21,959 INFO L225 Difference]: With dead ends: 39264 [2021-06-05 14:01:21,959 INFO L226 Difference]: Without dead ends: 39264 [2021-06-05 14:01:21,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-06-05 14:01:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-06-05 14:01:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-06-05 14:01:22,757 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-06-05 14:01:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:22,757 INFO L482 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-06-05 14:01:22,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-06-05 14:01:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:22,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:22,769 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:22,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9926,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:22,969 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:22,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-06-05 14:01:22,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:22,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084497961] [2021-06-05 14:01:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:23,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:23,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084497961] [2021-06-05 14:01:23,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084497961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:23,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324968556] [2021-06-05 14:01:23,043 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 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 [2021-06-05 14:01:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:23,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324968556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:23,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:23,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:23,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634409833] [2021-06-05 14:01:23,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:23,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:23,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:23,114 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:23,383 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-06-05 14:01:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:01:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:23,463 INFO L225 Difference]: With dead ends: 39365 [2021-06-05 14:01:23,464 INFO L226 Difference]: Without dead ends: 39365 [2021-06-05 14:01:23,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-06-05 14:01:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-06-05 14:01:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-06-05 14:01:24,275 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-06-05 14:01:24,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:24,275 INFO L482 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-06-05 14:01:24,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:24,275 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-06-05 14:01:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:24,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:24,288 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:24,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9927 [2021-06-05 14:01:24,488 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-06-05 14:01:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:24,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305282832] [2021-06-05 14:01:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:24,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:24,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305282832] [2021-06-05 14:01:24,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305282832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:24,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420909846] [2021-06-05 14:01:24,565 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 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 [2021-06-05 14:01:24,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:24,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420909846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:24,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:24,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:24,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017630285] [2021-06-05 14:01:24,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:24,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:24,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:24,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:24,639 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:25,327 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-06-05 14:01:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:25,409 INFO L225 Difference]: With dead ends: 40630 [2021-06-05 14:01:25,410 INFO L226 Difference]: Without dead ends: 40630 [2021-06-05 14:01:25,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:01:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-06-05 14:01:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-06-05 14:01:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-06-05 14:01:26,124 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-06-05 14:01:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:26,125 INFO L482 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-06-05 14:01:26,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-06-05 14:01:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:26,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:26,137 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:26,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9928,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:26,339 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-06-05 14:01:26,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:26,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991050479] [2021-06-05 14:01:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:26,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991050479] [2021-06-05 14:01:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991050479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121019393] [2021-06-05 14:01:26,440 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 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 [2021-06-05 14:01:26,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:01:26,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:26,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:26,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:26,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121019393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:26,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:26,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:26,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304345521] [2021-06-05 14:01:26,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:26,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:26,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:26,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:26,533 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:27,272 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-06-05 14:01:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:01:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:27,345 INFO L225 Difference]: With dead ends: 42248 [2021-06-05 14:01:27,345 INFO L226 Difference]: Without dead ends: 42248 [2021-06-05 14:01:27,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:01:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-06-05 14:01:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-06-05 14:01:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-06-05 14:01:28,033 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-06-05 14:01:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:28,033 INFO L482 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-06-05 14:01:28,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-06-05 14:01:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:28,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:28,046 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:28,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9929,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:28,247 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-06-05 14:01:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:28,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880188156] [2021-06-05 14:01:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:28,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:28,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880188156] [2021-06-05 14:01:28,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880188156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:28,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426259619] [2021-06-05 14:01:28,310 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 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 [2021-06-05 14:01:28,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:28,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:28,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:28,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426259619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:28,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:28,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:01:28,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850567452] [2021-06-05 14:01:28,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:01:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:01:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:01:28,588 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:01:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:28,916 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-06-05 14:01:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 22 [2021-06-05 14:01:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:28,981 INFO L225 Difference]: With dead ends: 41740 [2021-06-05 14:01:28,981 INFO L226 Difference]: Without dead ends: 41734 [2021-06-05 14:01:28,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:01:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-06-05 14:01:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-06-05 14:01:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-06-05 14:01:29,907 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-06-05 14:01:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:29,907 INFO L482 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-06-05 14:01:29,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-05 14:01:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-06-05 14:01:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:29,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:29,917 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:30,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9930 [2021-06-05 14:01:30,118 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:30,118 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-06-05 14:01:30,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:30,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669101520] [2021-06-05 14:01:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:30,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669101520] [2021-06-05 14:01:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669101520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677583708] [2021-06-05 14:01:30,179 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 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 [2021-06-05 14:01:30,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:01:30,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:30,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:30,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677583708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:30,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:30,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:01:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209530780] [2021-06-05 14:01:30,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:01:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:01:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:01:30,245 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:30,435 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-06-05 14:01:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:01:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:01:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:30,511 INFO L225 Difference]: With dead ends: 46670 [2021-06-05 14:01:30,511 INFO L226 Difference]: Without dead ends: 46670 [2021-06-05 14:01:30,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:01:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-06-05 14:01:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-06-05 14:01:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-06-05 14:01:31,555 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-06-05 14:01:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:31,555 INFO L482 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-06-05 14:01:31,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:01:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-06-05 14:01:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:31,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:31,571 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:31,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9931,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:31,772 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:31,772 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-06-05 14:01:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:31,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081203085] [2021-06-05 14:01:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:31,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081203085] [2021-06-05 14:01:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081203085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849375654] [2021-06-05 14:01:31,850 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 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 [2021-06-05 14:01:31,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:01:31,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:31,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849375654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:31,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:31,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:01:31,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131922671] [2021-06-05 14:01:31,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:31,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:31,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:31,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:31,923 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:32,229 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-06-05 14:01:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:01:32,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:32,322 INFO L225 Difference]: With dead ends: 49343 [2021-06-05 14:01:32,322 INFO L226 Difference]: Without dead ends: 49343 [2021-06-05 14:01:32,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-06-05 14:01:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-06-05 14:01:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-06-05 14:01:33,380 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-06-05 14:01:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:33,380 INFO L482 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-06-05 14:01:33,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-06-05 14:01:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:33,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:33,397 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:33,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9932 [2021-06-05 14:01:33,597 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-06-05 14:01:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:33,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612401103] [2021-06-05 14:01:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:33,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:33,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612401103] [2021-06-05 14:01:33,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612401103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:33,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334766289] [2021-06-05 14:01:33,670 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 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 [2021-06-05 14:01:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:33,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:33,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334766289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:33,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:33,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:01:33,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810473575] [2021-06-05 14:01:33,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:33,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:33,734 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:34,094 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-06-05 14:01:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:34,219 INFO L225 Difference]: With dead ends: 55150 [2021-06-05 14:01:34,219 INFO L226 Difference]: Without dead ends: 55150 [2021-06-05 14:01:34,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:01:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-06-05 14:01:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-06-05 14:01:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-06-05 14:01:35,410 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-06-05 14:01:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:35,410 INFO L482 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-06-05 14:01:35,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-06-05 14:01:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:35,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:35,428 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9933,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:35,628 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-06-05 14:01:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566110733] [2021-06-05 14:01:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:35,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:35,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566110733] [2021-06-05 14:01:35,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566110733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:35,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039953636] [2021-06-05 14:01:35,703 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 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 [2021-06-05 14:01:35,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:35,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:35,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:35,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:35,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039953636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:35,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:35,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:01:35,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248568558] [2021-06-05 14:01:35,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:35,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:35,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:35,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:35,769 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:36,512 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-06-05 14:01:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:01:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:36,626 INFO L225 Difference]: With dead ends: 68037 [2021-06-05 14:01:36,626 INFO L226 Difference]: Without dead ends: 68037 [2021-06-05 14:01:36,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:01:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-06-05 14:01:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-06-05 14:01:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-06-05 14:01:37,937 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-06-05 14:01:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:37,937 INFO L482 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-06-05 14:01:37,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-06-05 14:01:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:37,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:37,956 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:38,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9934,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:38,156 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-06-05 14:01:38,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:38,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965496675] [2021-06-05 14:01:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:38,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:38,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965496675] [2021-06-05 14:01:38,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965496675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:38,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911754287] [2021-06-05 14:01:38,226 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 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 [2021-06-05 14:01:38,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:01:38,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:38,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:38,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:38,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911754287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:38,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:38,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556500821] [2021-06-05 14:01:38,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:38,299 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:38,719 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-06-05 14:01:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:01:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:38,879 INFO L225 Difference]: With dead ends: 75602 [2021-06-05 14:01:38,879 INFO L226 Difference]: Without dead ends: 75602 [2021-06-05 14:01:38,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:01:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-06-05 14:01:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-06-05 14:01:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-06-05 14:01:40,308 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-06-05 14:01:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:40,308 INFO L482 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-06-05 14:01:40,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-06-05 14:01:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:40,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:40,325 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:40,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9935,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:40,526 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-06-05 14:01:40,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:40,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550860405] [2021-06-05 14:01:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:40,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:40,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550860405] [2021-06-05 14:01:40,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550860405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:40,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429874875] [2021-06-05 14:01:40,600 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 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 [2021-06-05 14:01:40,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:40,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:40,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:40,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:40,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429874875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:40,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:40,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:40,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044388778] [2021-06-05 14:01:40,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:40,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:40,674 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:41,436 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-06-05 14:01:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:01:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:41,569 INFO L225 Difference]: With dead ends: 68985 [2021-06-05 14:01:41,569 INFO L226 Difference]: Without dead ends: 68985 [2021-06-05 14:01:41,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:01:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-06-05 14:01:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-06-05 14:01:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-06-05 14:01:42,738 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-06-05 14:01:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:42,738 INFO L482 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-06-05 14:01:42,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-06-05 14:01:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:42,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:42,752 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:42,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9936,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:42,952 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-06-05 14:01:42,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:42,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675323038] [2021-06-05 14:01:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:43,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:43,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675323038] [2021-06-05 14:01:43,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675323038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:43,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208602529] [2021-06-05 14:01:43,013 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 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 [2021-06-05 14:01:43,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:43,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:43,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:43,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:43,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208602529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:43,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:43,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:01:43,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355929450] [2021-06-05 14:01:43,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:43,086 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:43,338 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-06-05 14:01:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:01:43,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:43,447 INFO L225 Difference]: With dead ends: 49438 [2021-06-05 14:01:43,447 INFO L226 Difference]: Without dead ends: 49438 [2021-06-05 14:01:43,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-06-05 14:01:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-06-05 14:01:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-06-05 14:01:44,484 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-06-05 14:01:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:44,485 INFO L482 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-06-05 14:01:44,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-06-05 14:01:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:44,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:44,495 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:44,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9937 [2021-06-05 14:01:44,695 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-06-05 14:01:44,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:44,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609784141] [2021-06-05 14:01:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:44,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:44,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609784141] [2021-06-05 14:01:44,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609784141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:44,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985802903] [2021-06-05 14:01:44,760 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 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 [2021-06-05 14:01:44,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:44,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985802903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:44,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:44,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:01:44,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101595115] [2021-06-05 14:01:44,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:01:44,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:44,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:01:44,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:01:44,833 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:45,037 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-06-05 14:01:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:01:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:01:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:45,105 INFO L225 Difference]: With dead ends: 38526 [2021-06-05 14:01:45,106 INFO L226 Difference]: Without dead ends: 38526 [2021-06-05 14:01:45,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-06-05 14:01:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-06-05 14:01:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-06-05 14:01:46,030 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-06-05 14:01:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:46,030 INFO L482 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-06-05 14:01:46,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:01:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-06-05 14:01:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:46,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:46,042 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:46,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9938,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:46,243 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:46,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-06-05 14:01:46,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:46,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94819897] [2021-06-05 14:01:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:46,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94819897] [2021-06-05 14:01:46,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94819897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625303607] [2021-06-05 14:01:46,315 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 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 [2021-06-05 14:01:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:46,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:46,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:46,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625303607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:46,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:46,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:46,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615042592] [2021-06-05 14:01:46,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:46,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:46,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:46,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:46,388 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:46,657 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-06-05 14:01:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:01:46,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:46,724 INFO L225 Difference]: With dead ends: 38877 [2021-06-05 14:01:46,724 INFO L226 Difference]: Without dead ends: 38877 [2021-06-05 14:01:46,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-06-05 14:01:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-06-05 14:01:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-06-05 14:01:47,759 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-06-05 14:01:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:47,759 INFO L482 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-06-05 14:01:47,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-06-05 14:01:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:47,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:47,770 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:47,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9939 [2021-06-05 14:01:47,971 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:47,971 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-06-05 14:01:47,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:47,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251250294] [2021-06-05 14:01:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:48,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:48,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251250294] [2021-06-05 14:01:48,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251250294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:48,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523974627] [2021-06-05 14:01:48,047 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 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 [2021-06-05 14:01:48,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:48,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523974627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:48,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:48,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:48,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497793841] [2021-06-05 14:01:48,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:48,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:48,119 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:48,485 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-06-05 14:01:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:48,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:48,562 INFO L225 Difference]: With dead ends: 39004 [2021-06-05 14:01:48,562 INFO L226 Difference]: Without dead ends: 39004 [2021-06-05 14:01:48,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:01:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-06-05 14:01:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-06-05 14:01:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-06-05 14:01:49,549 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-06-05 14:01:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:49,549 INFO L482 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-06-05 14:01:49,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-06-05 14:01:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:49,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:49,560 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:49,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-06-05 14:01:49,761 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-06-05 14:01:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:49,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748331928] [2021-06-05 14:01:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:49,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:49,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748331928] [2021-06-05 14:01:49,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748331928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:49,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220202765] [2021-06-05 14:01:49,841 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 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 [2021-06-05 14:01:49,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:01:49,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:49,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220202765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:49,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:49,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:49,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951470266] [2021-06-05 14:01:49,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:49,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:49,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:49,933 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:50,398 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-06-05 14:01:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:01:50,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:50,474 INFO L225 Difference]: With dead ends: 39220 [2021-06-05 14:01:50,474 INFO L226 Difference]: Without dead ends: 39220 [2021-06-05 14:01:50,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:01:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-06-05 14:01:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-06-05 14:01:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-06-05 14:01:51,464 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-06-05 14:01:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:51,464 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-06-05 14:01:51,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-06-05 14:01:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:51,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:51,476 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:51,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9941 [2021-06-05 14:01:51,676 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-06-05 14:01:51,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:51,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000089646] [2021-06-05 14:01:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:51,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000089646] [2021-06-05 14:01:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000089646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432349067] [2021-06-05 14:01:51,734 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 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 [2021-06-05 14:01:51,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:51,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:51,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:51,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:51,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432349067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:51,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:51,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:01:51,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037583697] [2021-06-05 14:01:51,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:01:51,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:51,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:01:51,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:01:51,800 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 14:01:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:52,099 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-06-05 14:01:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:52,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 22 [2021-06-05 14:01:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:52,169 INFO L225 Difference]: With dead ends: 37627 [2021-06-05 14:01:52,169 INFO L226 Difference]: Without dead ends: 37623 [2021-06-05 14:01:52,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-06-05 14:01:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-06-05 14:01:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-06-05 14:01:53,183 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-06-05 14:01:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:53,183 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-06-05 14:01:53,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-05 14:01:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-06-05 14:01:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:53,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:53,195 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:53,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9942 [2021-06-05 14:01:53,395 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-06-05 14:01:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:53,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889531222] [2021-06-05 14:01:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:53,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:53,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889531222] [2021-06-05 14:01:53,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889531222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:53,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057771209] [2021-06-05 14:01:53,472 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 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 [2021-06-05 14:01:53,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:53,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:53,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057771209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:53,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:53,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:53,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679800414] [2021-06-05 14:01:53,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:53,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:53,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:53,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:53,547 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:53,947 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-06-05 14:01:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:54,035 INFO L225 Difference]: With dead ends: 44126 [2021-06-05 14:01:54,036 INFO L226 Difference]: Without dead ends: 44126 [2021-06-05 14:01:54,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:01:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-06-05 14:01:54,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-06-05 14:01:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-06-05 14:01:55,080 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-06-05 14:01:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:55,080 INFO L482 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-06-05 14:01:55,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-06-05 14:01:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:55,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:55,096 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:55,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9943,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:55,298 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:55,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-06-05 14:01:55,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:55,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475866450] [2021-06-05 14:01:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:55,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:55,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475866450] [2021-06-05 14:01:55,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475866450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:55,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875929395] [2021-06-05 14:01:55,373 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 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 [2021-06-05 14:01:55,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:55,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:55,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875929395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:55,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:55,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:55,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273598469] [2021-06-05 14:01:55,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:55,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:55,447 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:55,791 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-06-05 14:01:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:55,882 INFO L225 Difference]: With dead ends: 46244 [2021-06-05 14:01:55,882 INFO L226 Difference]: Without dead ends: 46244 [2021-06-05 14:01:55,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:01:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-06-05 14:01:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-06-05 14:01:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-06-05 14:01:56,927 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-06-05 14:01:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:56,927 INFO L482 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-06-05 14:01:56,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-06-05 14:01:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:56,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:56,944 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:57,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9944,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:57,145 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-06-05 14:01:57,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:57,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214833757] [2021-06-05 14:01:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:57,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:57,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214833757] [2021-06-05 14:01:57,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214833757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:57,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766822961] [2021-06-05 14:01:57,225 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 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 [2021-06-05 14:01:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:57,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766822961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:57,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:57,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:01:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203219162] [2021-06-05 14:01:57,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:01:57,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:01:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:01:57,302 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:57,747 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-06-05 14:01:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:01:57,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:01:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:57,829 INFO L225 Difference]: With dead ends: 47891 [2021-06-05 14:01:57,829 INFO L226 Difference]: Without dead ends: 47891 [2021-06-05 14:01:57,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:01:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-06-05 14:01:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-06-05 14:01:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-06-05 14:01:58,953 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-06-05 14:01:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:58,953 INFO L482 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-06-05 14:01:58,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:01:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-06-05 14:01:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:01:58,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:58,972 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:59,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9945,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:59,172 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-06-05 14:01:59,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:59,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304485220] [2021-06-05 14:01:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:59,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:59,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304485220] [2021-06-05 14:01:59,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304485220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:59,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391051254] [2021-06-05 14:01:59,227 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 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 [2021-06-05 14:01:59,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:59,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:01:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:59,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391051254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:59,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:59,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:01:59,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916245618] [2021-06-05 14:01:59,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:01:59,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:59,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:01:59,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:01:59,291 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:01:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:59,577 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-06-05 14:01:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:01:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:59,654 INFO L225 Difference]: With dead ends: 47040 [2021-06-05 14:01:59,654 INFO L226 Difference]: Without dead ends: 47036 [2021-06-05 14:01:59,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-06-05 14:02:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-06-05 14:02:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-06-05 14:02:00,780 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-06-05 14:02:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:00,780 INFO L482 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-06-05 14:02:00,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:02:00,781 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-06-05 14:02:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:00,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:00,798 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:00,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9946,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:00,999 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-06-05 14:02:00,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:00,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240766648] [2021-06-05 14:02:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:01,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240766648] [2021-06-05 14:02:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240766648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990261074] [2021-06-05 14:02:01,053 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 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 [2021-06-05 14:02:01,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:02:01,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:01,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990261074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:01,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:01,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:02:01,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851462247] [2021-06-05 14:02:01,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:02:01,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:01,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:02:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:02:01,119 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:02:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:01,366 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-06-05 14:02:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-06-05 14:02:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:01,451 INFO L225 Difference]: With dead ends: 47717 [2021-06-05 14:02:01,451 INFO L226 Difference]: Without dead ends: 47717 [2021-06-05 14:02:01,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:02:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-06-05 14:02:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-06-05 14:02:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-06-05 14:02:02,609 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-06-05 14:02:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:02,609 INFO L482 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-06-05 14:02:02,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:02:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-06-05 14:02:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:02,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:02,627 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:02,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9947,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:02,828 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:02,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-06-05 14:02:02,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:02,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356455915] [2021-06-05 14:02:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:02,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356455915] [2021-06-05 14:02:02,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356455915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466767025] [2021-06-05 14:02:02,883 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 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 [2021-06-05 14:02:02,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:02,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:02,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:02,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:02,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466767025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:02,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:02:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234377900] [2021-06-05 14:02:02,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:02:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:02:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:02:02,953 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:02:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:03,617 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-06-05 14:02:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:02:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:03,697 INFO L225 Difference]: With dead ends: 48348 [2021-06-05 14:02:03,697 INFO L226 Difference]: Without dead ends: 48348 [2021-06-05 14:02:03,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-06-05 14:02:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-06-05 14:02:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-06-05 14:02:04,491 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-06-05 14:02:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:04,492 INFO L482 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-06-05 14:02:04,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:02:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-06-05 14:02:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:04,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:04,509 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:04,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9948 [2021-06-05 14:02:04,710 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:04,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:04,710 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-06-05 14:02:04,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:04,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557820927] [2021-06-05 14:02:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:04,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:04,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557820927] [2021-06-05 14:02:04,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557820927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:04,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305461270] [2021-06-05 14:02:04,768 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 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 [2021-06-05 14:02:04,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:02:04,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:05,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305461270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:05,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:05,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:02:05,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823294328] [2021-06-05 14:02:05,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:02:05,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:05,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:02:05,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:02:05,152 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:02:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:05,544 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-06-05 14:02:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 22 [2021-06-05 14:02:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:05,685 INFO L225 Difference]: With dead ends: 64639 [2021-06-05 14:02:05,685 INFO L226 Difference]: Without dead ends: 64639 [2021-06-05 14:02:05,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-06-05 14:02:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-06-05 14:02:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-06-05 14:02:07,065 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-06-05 14:02:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:07,065 INFO L482 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-06-05 14:02:07,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-05 14:02:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-06-05 14:02:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:07,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:07,085 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:07,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9949,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:07,286 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:07,286 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-06-05 14:02:07,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:07,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727600537] [2021-06-05 14:02:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:07,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:07,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727600537] [2021-06-05 14:02:07,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727600537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:07,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699517891] [2021-06-05 14:02:07,350 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 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 [2021-06-05 14:02:07,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:02:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:07,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699517891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:07,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:07,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:02:07,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35479539] [2021-06-05 14:02:07,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:02:07,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:07,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:02:07,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:02:07,423 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:02:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:07,800 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-06-05 14:02:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:02:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:07,935 INFO L225 Difference]: With dead ends: 64066 [2021-06-05 14:02:07,935 INFO L226 Difference]: Without dead ends: 64066 [2021-06-05 14:02:07,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-06-05 14:02:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-06-05 14:02:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-06-05 14:02:09,460 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-06-05 14:02:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:09,460 INFO L482 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-06-05 14:02:09,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:02:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-06-05 14:02:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:09,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:09,480 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:09,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9950 [2021-06-05 14:02:09,681 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-06-05 14:02:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:09,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396607118] [2021-06-05 14:02:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:09,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396607118] [2021-06-05 14:02:09,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396607118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703569151] [2021-06-05 14:02:09,746 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 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 [2021-06-05 14:02:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:09,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703569151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:09,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:09,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:02:09,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177581448] [2021-06-05 14:02:09,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:02:09,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:09,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:02:09,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:02:09,817 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:02:10,115 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 14:02:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:10,439 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-06-05 14:02:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:02:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:02:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:10,596 INFO L225 Difference]: With dead ends: 73057 [2021-06-05 14:02:10,596 INFO L226 Difference]: Without dead ends: 73057 [2021-06-05 14:02:10,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:02:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-06-05 14:02:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-06-05 14:02:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-06-05 14:02:12,222 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-06-05 14:02:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:12,222 INFO L482 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-06-05 14:02:12,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:02:12,223 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-06-05 14:02:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:12,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:12,246 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:12,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9951 [2021-06-05 14:02:12,447 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-06-05 14:02:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:12,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82190246] [2021-06-05 14:02:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:12,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82190246] [2021-06-05 14:02:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82190246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586412679] [2021-06-05 14:02:12,516 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 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 [2021-06-05 14:02:12,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:12,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586412679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:12,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:12,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:02:12,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049491870] [2021-06-05 14:02:12,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:02:12,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:12,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:02:12,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:02:12,589 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 transitions. Second operand has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:02:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:12,952 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-06-05 14:02:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:02:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) 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 22 [2021-06-05 14:02:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:13,123 INFO L225 Difference]: With dead ends: 76219 [2021-06-05 14:02:13,123 INFO L226 Difference]: Without dead ends: 76219 [2021-06-05 14:02:13,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-06-05 14:02:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-06-05 14:02:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-06-05 14:02:15,162 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-06-05 14:02:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:15,162 INFO L482 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-06-05 14:02:15,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) 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) [2021-06-05 14:02:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-06-05 14:02:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:15,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:15,187 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:15,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9952 [2021-06-05 14:02:15,388 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:15,388 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-06-05 14:02:15,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:15,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148829894] [2021-06-05 14:02:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:15,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:15,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148829894] [2021-06-05 14:02:15,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148829894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:15,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226702048] [2021-06-05 14:02:15,466 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 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 [2021-06-05 14:02:15,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:02:15,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:15,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:15,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226702048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:15,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:15,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:02:15,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653086865] [2021-06-05 14:02:15,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:15,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:15,539 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:02:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:15,983 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-06-05 14:02:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:02:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:16,159 INFO L225 Difference]: With dead ends: 76769 [2021-06-05 14:02:16,159 INFO L226 Difference]: Without dead ends: 76769 [2021-06-05 14:02:16,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-06-05 14:02:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-06-05 14:02:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-06-05 14:02:18,465 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-06-05 14:02:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:18,465 INFO L482 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-06-05 14:02:18,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:02:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-06-05 14:02:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:18,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:18,490 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:18,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9953 [2021-06-05 14:02:18,691 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:18,691 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-06-05 14:02:18,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:18,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750458472] [2021-06-05 14:02:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:18,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:18,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750458472] [2021-06-05 14:02:18,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750458472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022586117] [2021-06-05 14:02:18,772 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 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 [2021-06-05 14:02:18,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:18,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:18,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:18,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022586117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:18,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:02:18,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864163113] [2021-06-05 14:02:18,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:18,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:18,845 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:02:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:19,356 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-06-05 14:02:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:02:19,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:02:19,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:19,540 INFO L225 Difference]: With dead ends: 77589 [2021-06-05 14:02:19,540 INFO L226 Difference]: Without dead ends: 77589 [2021-06-05 14:02:19,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:02:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-06-05 14:02:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-06-05 14:02:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-06-05 14:02:21,300 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-06-05 14:02:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:21,300 INFO L482 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-06-05 14:02:21,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:02:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-06-05 14:02:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:21,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:21,327 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:21,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9954,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:21,527 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-06-05 14:02:21,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:21,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728992382] [2021-06-05 14:02:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728992382] [2021-06-05 14:02:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728992382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138492675] [2021-06-05 14:02:21,612 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 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 [2021-06-05 14:02:21,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:02:21,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:21,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138492675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:21,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:02:21,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323053481] [2021-06-05 14:02:21,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:21,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:21,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:21,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:21,976 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:02:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:22,577 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-06-05 14:02:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:02:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 22 [2021-06-05 14:02:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:22,756 INFO L225 Difference]: With dead ends: 78959 [2021-06-05 14:02:22,756 INFO L226 Difference]: Without dead ends: 78959 [2021-06-05 14:02:22,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:02:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-06-05 14:02:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-06-05 14:02:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-06-05 14:02:24,492 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-06-05 14:02:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:24,492 INFO L482 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-06-05 14:02:24,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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) [2021-06-05 14:02:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-06-05 14:02:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:24,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:24,518 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:24,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9955,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:24,718 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-06-05 14:02:24,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:24,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416592609] [2021-06-05 14:02:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:24,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416592609] [2021-06-05 14:02:24,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416592609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911255056] [2021-06-05 14:02:24,812 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 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 [2021-06-05 14:02:24,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:02:24,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:24,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:24,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911255056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:24,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 14:02:24,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024541679] [2021-06-05 14:02:24,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:24,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:24,882 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:25,851 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-06-05 14:02:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:02:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:02:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:26,063 INFO L225 Difference]: With dead ends: 77569 [2021-06-05 14:02:26,063 INFO L226 Difference]: Without dead ends: 77563 [2021-06-05 14:02:26,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:02:26,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-06-05 14:02:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-06-05 14:02:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-06-05 14:02:27,752 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-06-05 14:02:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:27,752 INFO L482 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-06-05 14:02:27,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-06-05 14:02:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:27,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:27,779 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:27,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9956,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:27,981 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-06-05 14:02:27,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:27,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858514996] [2021-06-05 14:02:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:28,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:28,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858514996] [2021-06-05 14:02:28,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858514996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338347316] [2021-06-05 14:02:28,070 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 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 [2021-06-05 14:02:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:28,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:28,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338347316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:28,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 14:02:28,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783510663] [2021-06-05 14:02:28,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:28,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:28,151 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:29,194 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-06-05 14:02:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:02:29,194 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:02:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:29,455 INFO L225 Difference]: With dead ends: 105545 [2021-06-05 14:02:29,455 INFO L226 Difference]: Without dead ends: 105545 [2021-06-05 14:02:29,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:02:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-06-05 14:02:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-06-05 14:02:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-06-05 14:02:31,524 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-06-05 14:02:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:31,524 INFO L482 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-06-05 14:02:31,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-06-05 14:02:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:31,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:31,560 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:31,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9957,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:31,761 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-06-05 14:02:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:31,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128467874] [2021-06-05 14:02:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:31,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:31,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128467874] [2021-06-05 14:02:31,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128467874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:31,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067853982] [2021-06-05 14:02:31,841 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 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 [2021-06-05 14:02:31,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:31,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:31,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067853982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:31,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:31,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:02:31,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900673095] [2021-06-05 14:02:31,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:02:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:02:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:31,921 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:32,439 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 14:02:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:33,008 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-06-05 14:02:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:02:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:33,292 INFO L225 Difference]: With dead ends: 114469 [2021-06-05 14:02:33,292 INFO L226 Difference]: Without dead ends: 114469 [2021-06-05 14:02:33,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:02:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-06-05 14:02:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-06-05 14:02:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-06-05 14:02:35,879 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-06-05 14:02:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:35,879 INFO L482 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-06-05 14:02:35,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-06-05 14:02:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:35,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:35,909 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:36,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9958 [2021-06-05 14:02:36,110 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-06-05 14:02:36,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:36,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183327140] [2021-06-05 14:02:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:36,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183327140] [2021-06-05 14:02:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183327140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281485174] [2021-06-05 14:02:36,196 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 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 [2021-06-05 14:02:36,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:02:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:36,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281485174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:36,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:02:36,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538909908] [2021-06-05 14:02:36,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:02:36,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:36,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:02:36,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:36,308 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:37,063 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-06-05 14:02:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:02:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:02:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:37,323 INFO L225 Difference]: With dead ends: 104983 [2021-06-05 14:02:37,323 INFO L226 Difference]: Without dead ends: 104983 [2021-06-05 14:02:37,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:02:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-06-05 14:02:39,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-06-05 14:02:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-06-05 14:02:39,789 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-06-05 14:02:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:39,789 INFO L482 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-06-05 14:02:39,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-06-05 14:02:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:39,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:39,819 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:40,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9959,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:40,019 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:40,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-06-05 14:02:40,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:40,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123320623] [2021-06-05 14:02:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:40,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:40,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123320623] [2021-06-05 14:02:40,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123320623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:40,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394125947] [2021-06-05 14:02:40,110 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 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 [2021-06-05 14:02:40,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:40,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:40,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394125947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:40,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:40,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:02:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441585844] [2021-06-05 14:02:40,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:02:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:40,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:02:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:40,194 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:41,096 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-06-05 14:02:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:02:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:02:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:41,863 INFO L225 Difference]: With dead ends: 104672 [2021-06-05 14:02:41,863 INFO L226 Difference]: Without dead ends: 104672 [2021-06-05 14:02:41,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:02:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-06-05 14:02:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-06-05 14:02:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-06-05 14:02:43,854 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-06-05 14:02:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:43,854 INFO L482 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-06-05 14:02:43,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-06-05 14:02:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:43,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:43,881 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:44,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9960 [2021-06-05 14:02:44,081 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-06-05 14:02:44,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:44,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323762924] [2021-06-05 14:02:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:44,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:44,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323762924] [2021-06-05 14:02:44,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323762924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:44,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658601368] [2021-06-05 14:02:44,165 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 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 [2021-06-05 14:02:44,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:02:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:44,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:44,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658601368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:44,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:44,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:02:44,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523294701] [2021-06-05 14:02:44,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:02:44,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:44,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:02:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:44,249 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:45,369 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-06-05 14:02:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:02:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:02:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:45,650 INFO L225 Difference]: With dead ends: 105621 [2021-06-05 14:02:45,650 INFO L226 Difference]: Without dead ends: 105621 [2021-06-05 14:02:45,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:02:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-06-05 14:02:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-06-05 14:02:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-06-05 14:02:47,797 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-06-05 14:02:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:47,798 INFO L482 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-06-05 14:02:47,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-06-05 14:02:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:47,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:47,828 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:48,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9961 [2021-06-05 14:02:48,030 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:48,030 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-06-05 14:02:48,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:48,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865002652] [2021-06-05 14:02:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:48,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865002652] [2021-06-05 14:02:48,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865002652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:48,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936953139] [2021-06-05 14:02:48,516 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 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 [2021-06-05 14:02:48,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:02:48,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:48,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936953139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:48,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:48,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:02:48,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063509081] [2021-06-05 14:02:48,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:02:48,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:02:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:48,634 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:49,425 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-06-05 14:02:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 14:02:49,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:02:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:49,646 INFO L225 Difference]: With dead ends: 96355 [2021-06-05 14:02:49,646 INFO L226 Difference]: Without dead ends: 96355 [2021-06-05 14:02:49,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:02:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-06-05 14:02:51,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-06-05 14:02:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-06-05 14:02:51,867 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-06-05 14:02:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:51,868 INFO L482 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-06-05 14:02:51,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-06-05 14:02:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:51,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:51,900 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:52,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9962,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:52,102 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-06-05 14:02:52,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:52,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729431332] [2021-06-05 14:02:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:52,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:52,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729431332] [2021-06-05 14:02:52,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729431332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:52,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682342869] [2021-06-05 14:02:52,175 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 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 [2021-06-05 14:02:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:52,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682342869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:52,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:52,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 14:02:52,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456351999] [2021-06-05 14:02:52,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:52,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:52,257 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:52,760 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-06-05 14:02:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:02:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:02:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:52,922 INFO L225 Difference]: With dead ends: 91563 [2021-06-05 14:02:52,922 INFO L226 Difference]: Without dead ends: 91563 [2021-06-05 14:02:52,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:02:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-06-05 14:02:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-06-05 14:02:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-06-05 14:02:55,130 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-06-05 14:02:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:55,131 INFO L482 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-06-05 14:02:55,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-06-05 14:02:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:55,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:55,156 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:55,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9963 [2021-06-05 14:02:55,357 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:55,357 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-06-05 14:02:55,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:55,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366356405] [2021-06-05 14:02:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:55,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:55,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366356405] [2021-06-05 14:02:55,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366356405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:55,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353677663] [2021-06-05 14:02:55,441 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 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 [2021-06-05 14:02:55,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:55,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:55,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:55,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353677663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:55,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:55,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 14:02:55,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754820937] [2021-06-05 14:02:55,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:55,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:55,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:55,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:55,528 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:56,033 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-06-05 14:02:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:02:56,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:02:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:56,219 INFO L225 Difference]: With dead ends: 90021 [2021-06-05 14:02:56,219 INFO L226 Difference]: Without dead ends: 90021 [2021-06-05 14:02:56,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:02:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-06-05 14:02:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-06-05 14:02:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-06-05 14:02:58,378 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-06-05 14:02:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:58,379 INFO L482 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-06-05 14:02:58,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-06-05 14:02:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:02:58,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:58,403 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:58,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9964,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:58,604 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-06-05 14:02:58,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:58,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893999157] [2021-06-05 14:02:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:58,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:58,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893999157] [2021-06-05 14:02:58,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893999157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:58,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897061753] [2021-06-05 14:02:58,687 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 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 [2021-06-05 14:02:58,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:02:58,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:02:58,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:58,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897061753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:58,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:58,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:02:58,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377864153] [2021-06-05 14:02:58,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:02:58,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:02:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:58,779 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:02:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:59,367 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-06-05 14:02:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:02:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:02:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:59,548 INFO L225 Difference]: With dead ends: 91085 [2021-06-05 14:02:59,549 INFO L226 Difference]: Without dead ends: 91085 [2021-06-05 14:02:59,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:02:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-06-05 14:03:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-06-05 14:03:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-06-05 14:03:01,599 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-06-05 14:03:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:01,599 INFO L482 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-06-05 14:03:01,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:03:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-06-05 14:03:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:01,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:01,624 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:01,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9965 [2021-06-05 14:03:01,826 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-06-05 14:03:01,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:01,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466628992] [2021-06-05 14:03:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:01,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:01,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466628992] [2021-06-05 14:03:01,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466628992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:01,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228370135] [2021-06-05 14:03:01,912 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 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 [2021-06-05 14:03:01,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:01,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:01,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:01,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228370135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:01,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:01,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:03:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245795800] [2021-06-05 14:03:01,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:03:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:01,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:03:01,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:03:01,992 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:03:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:02,678 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-06-05 14:03:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:03:02,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:03:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:02,855 INFO L225 Difference]: With dead ends: 89148 [2021-06-05 14:03:02,855 INFO L226 Difference]: Without dead ends: 89148 [2021-06-05 14:03:02,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:03:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-06-05 14:03:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-06-05 14:03:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-06-05 14:03:05,097 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-06-05 14:03:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:05,097 INFO L482 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-06-05 14:03:05,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:03:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-06-05 14:03:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:05,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:05,125 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:05,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9966,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:05,329 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-06-05 14:03:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:05,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623847687] [2021-06-05 14:03:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:05,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:05,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623847687] [2021-06-05 14:03:05,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623847687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:05,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028983919] [2021-06-05 14:03:05,422 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 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 [2021-06-05 14:03:05,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:03:05,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028983919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:05,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:05,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 14:03:05,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141657801] [2021-06-05 14:03:05,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:03:05,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:05,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:03:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:03:05,515 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:03:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:06,235 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-06-05 14:03:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:03:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 14:03:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:06,432 INFO L225 Difference]: With dead ends: 89118 [2021-06-05 14:03:06,433 INFO L226 Difference]: Without dead ends: 89118 [2021-06-05 14:03:06,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:03:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-06-05 14:03:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-06-05 14:03:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-06-05 14:03:08,660 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-06-05 14:03:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:08,660 INFO L482 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-06-05 14:03:08,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:03:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-06-05 14:03:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:08,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:08,686 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:08,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9967,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:08,887 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-06-05 14:03:08,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:08,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085570472] [2021-06-05 14:03:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:08,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:08,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085570472] [2021-06-05 14:03:08,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085570472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:08,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853777612] [2021-06-05 14:03:08,984 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 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 [2021-06-05 14:03:09,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:03:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:09,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:09,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853777612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:09,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:09,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 14:03:09,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408394770] [2021-06-05 14:03:09,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:03:09,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:03:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:03:09,051 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 14:03:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:09,588 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-06-05 14:03:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:03:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22 [2021-06-05 14:03:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:09,760 INFO L225 Difference]: With dead ends: 87690 [2021-06-05 14:03:09,760 INFO L226 Difference]: Without dead ends: 87686 [2021-06-05 14:03:09,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-06-05 14:03:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-06-05 14:03:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-06-05 14:03:11,897 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-06-05 14:03:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:11,897 INFO L482 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-06-05 14:03:11,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2021-06-05 14:03:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-06-05 14:03:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:11,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:11,924 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:12,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9968,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:12,125 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:12,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-06-05 14:03:12,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:12,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136238115] [2021-06-05 14:03:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:12,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136238115] [2021-06-05 14:03:12,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136238115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:12,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660121574] [2021-06-05 14:03:12,231 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 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 [2021-06-05 14:03:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:12,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660121574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:12,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:12,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 14:03:12,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287814920] [2021-06-05 14:03:12,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:12,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:12,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:12,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:12,334 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-06-05 14:03:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:13,016 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-06-05 14:03:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:03:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 22 [2021-06-05 14:03:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:13,188 INFO L225 Difference]: With dead ends: 97092 [2021-06-05 14:03:13,188 INFO L226 Difference]: Without dead ends: 97092 [2021-06-05 14:03:13,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:03:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-06-05 14:03:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-06-05 14:03:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-06-05 14:03:15,411 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-06-05 14:03:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:15,411 INFO L482 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-06-05 14:03:15,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-06-05 14:03:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-06-05 14:03:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:15,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:15,443 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:15,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9969 [2021-06-05 14:03:15,644 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-06-05 14:03:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:15,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573131265] [2021-06-05 14:03:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:15,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:15,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573131265] [2021-06-05 14:03:15,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573131265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:15,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879623428] [2021-06-05 14:03:15,733 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 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 [2021-06-05 14:03:15,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:15,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:15,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:15,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:15,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879623428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:15,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:15,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 14:03:15,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472505019] [2021-06-05 14:03:15,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:15,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:15,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:15,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:15,834 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-06-05 14:03:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:16,978 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-06-05 14:03:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:03:16,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 22 [2021-06-05 14:03:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:17,260 INFO L225 Difference]: With dead ends: 97575 [2021-06-05 14:03:17,260 INFO L226 Difference]: Without dead ends: 97575 [2021-06-05 14:03:17,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:03:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-06-05 14:03:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-06-05 14:03:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-06-05 14:03:19,247 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-06-05 14:03:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:19,247 INFO L482 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-06-05 14:03:19,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-06-05 14:03:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-06-05 14:03:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:19,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:19,288 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:19,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9970,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:19,488 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:19,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-06-05 14:03:19,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:19,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535716247] [2021-06-05 14:03:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:19,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535716247] [2021-06-05 14:03:19,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535716247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968864058] [2021-06-05 14:03:19,582 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 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 [2021-06-05 14:03:19,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:03:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:19,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968864058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:19,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:19,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 14:03:19,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895364370] [2021-06-05 14:03:19,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:19,673 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-06-05 14:03:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:20,751 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-06-05 14:03:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:03:20,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 22 [2021-06-05 14:03:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:20,984 INFO L225 Difference]: With dead ends: 98465 [2021-06-05 14:03:20,984 INFO L226 Difference]: Without dead ends: 98465 [2021-06-05 14:03:20,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:03:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-06-05 14:03:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-06-05 14:03:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-06-05 14:03:23,437 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-06-05 14:03:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:23,437 INFO L482 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-06-05 14:03:23,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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) [2021-06-05 14:03:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-06-05 14:03:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:23,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:23,477 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:23,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9971 [2021-06-05 14:03:23,677 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-06-05 14:03:23,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:23,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169996356] [2021-06-05 14:03:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:23,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169996356] [2021-06-05 14:03:23,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169996356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064029622] [2021-06-05 14:03:23,768 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 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 [2021-06-05 14:03:23,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:23,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064029622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:23,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:23,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 14:03:23,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543180561] [2021-06-05 14:03:23,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:03:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:03:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:03:23,833 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:03:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:24,346 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-06-05 14:03:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 22 [2021-06-05 14:03:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:24,541 INFO L225 Difference]: With dead ends: 96926 [2021-06-05 14:03:24,541 INFO L226 Difference]: Without dead ends: 96924 [2021-06-05 14:03:24,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-06-05 14:03:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-06-05 14:03:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-06-05 14:03:26,856 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-06-05 14:03:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:26,856 INFO L482 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-06-05 14:03:26,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:03:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-06-05 14:03:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:26,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:26,891 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:27,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9972 [2021-06-05 14:03:27,092 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-06-05 14:03:27,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:27,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122118657] [2021-06-05 14:03:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:27,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:27,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122118657] [2021-06-05 14:03:27,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122118657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:27,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984398690] [2021-06-05 14:03:27,179 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 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 [2021-06-05 14:03:27,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:03:27,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:27,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984398690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:27,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:27,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 14:03:27,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385688763] [2021-06-05 14:03:27,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:03:27,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:27,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:03:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:03:27,260 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:03:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:27,770 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-06-05 14:03:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 22 [2021-06-05 14:03:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:27,965 INFO L225 Difference]: With dead ends: 98650 [2021-06-05 14:03:27,965 INFO L226 Difference]: Without dead ends: 98650 [2021-06-05 14:03:27,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-06-05 14:03:29,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-06-05 14:03:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-06-05 14:03:30,323 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-06-05 14:03:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:30,323 INFO L482 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-06-05 14:03:30,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:03:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-06-05 14:03:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:30,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:30,353 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:30,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9973 [2021-06-05 14:03:30,554 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:30,554 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-06-05 14:03:30,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:30,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341453017] [2021-06-05 14:03:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:30,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:30,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341453017] [2021-06-05 14:03:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341453017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:30,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645567499] [2021-06-05 14:03:30,654 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 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 [2021-06-05 14:03:30,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:03:30,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:30,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645567499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:30,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:30,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 14:03:30,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799527485] [2021-06-05 14:03:30,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:03:30,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:03:30,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:03:30,737 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:03:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:31,284 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-06-05 14:03:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:03:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 22 [2021-06-05 14:03:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:31,476 INFO L225 Difference]: With dead ends: 100367 [2021-06-05 14:03:31,476 INFO L226 Difference]: Without dead ends: 100367 [2021-06-05 14:03:31,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:03:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-06-05 14:03:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-06-05 14:03:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-06-05 14:03:33,775 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-06-05 14:03:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:33,775 INFO L482 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-06-05 14:03:33,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:03:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-06-05 14:03:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:33,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:33,809 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:34,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9974 [2021-06-05 14:03:34,010 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-06-05 14:03:34,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:34,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241140239] [2021-06-05 14:03:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:34,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241140239] [2021-06-05 14:03:34,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241140239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827705852] [2021-06-05 14:03:34,098 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 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 [2021-06-05 14:03:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:34,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827705852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:34,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:34,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 14:03:34,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464259591] [2021-06-05 14:03:34,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:03:34,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:03:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:03:34,181 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:03:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:35,237 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-06-05 14:03:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:03:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 22 [2021-06-05 14:03:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:35,562 INFO L225 Difference]: With dead ends: 103852 [2021-06-05 14:03:35,562 INFO L226 Difference]: Without dead ends: 103852 [2021-06-05 14:03:35,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:03:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-06-05 14:03:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-06-05 14:03:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-06-05 14:03:37,802 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-06-05 14:03:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:37,802 INFO L482 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-06-05 14:03:37,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:03:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-06-05 14:03:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:37,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:37,842 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:38,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9975 [2021-06-05 14:03:38,042 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:38,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:38,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-06-05 14:03:38,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:38,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003522122] [2021-06-05 14:03:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:38,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003522122] [2021-06-05 14:03:38,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003522122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684723773] [2021-06-05 14:03:38,149 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 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 [2021-06-05 14:03:38,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:38,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684723773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:38,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:38,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 14:03:38,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453450816] [2021-06-05 14:03:38,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:03:38,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:03:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:03:38,235 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:03:38,634 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 14:03:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:39,393 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-06-05 14:03:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:03:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 22 [2021-06-05 14:03:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:39,692 INFO L225 Difference]: With dead ends: 117624 [2021-06-05 14:03:39,693 INFO L226 Difference]: Without dead ends: 117624 [2021-06-05 14:03:39,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:03:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-06-05 14:03:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-06-05 14:03:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-06-05 14:03:42,608 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-06-05 14:03:42,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:42,608 INFO L482 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-06-05 14:03:42,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:03:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-06-05 14:03:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:42,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:42,647 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:42,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9976,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:42,848 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-06-05 14:03:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:42,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533350512] [2021-06-05 14:03:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:42,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:42,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533350512] [2021-06-05 14:03:42,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533350512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:42,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925127703] [2021-06-05 14:03:42,939 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 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 [2021-06-05 14:03:42,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:03:42,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:42,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:43,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925127703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:43,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:43,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 14:03:43,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745193071] [2021-06-05 14:03:43,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:43,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:43,033 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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) [2021-06-05 14:03:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:44,366 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-06-05 14:03:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:03:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 22 [2021-06-05 14:03:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:45,007 INFO L225 Difference]: With dead ends: 117101 [2021-06-05 14:03:45,007 INFO L226 Difference]: Without dead ends: 117101 [2021-06-05 14:03:45,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:03:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-06-05 14:03:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-06-05 14:03:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-06-05 14:03:47,555 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-06-05 14:03:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:47,555 INFO L482 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-06-05 14:03:47,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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) [2021-06-05 14:03:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-06-05 14:03:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:48,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:48,034 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:48,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9977,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:48,234 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-06-05 14:03:48,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:48,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057973534] [2021-06-05 14:03:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:48,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:48,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057973534] [2021-06-05 14:03:48,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057973534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:48,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743297382] [2021-06-05 14:03:48,325 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 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 [2021-06-05 14:03:48,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:48,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:48,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743297382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:48,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:48,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 14:03:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74700682] [2021-06-05 14:03:48,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:48,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:48,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:48,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:48,421 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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) [2021-06-05 14:03:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:49,140 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-06-05 14:03:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:49,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 22 [2021-06-05 14:03:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:49,456 INFO L225 Difference]: With dead ends: 129613 [2021-06-05 14:03:49,457 INFO L226 Difference]: Without dead ends: 129613 [2021-06-05 14:03:49,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:03:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-06-05 14:03:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-06-05 14:03:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-06-05 14:03:52,499 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-06-05 14:03:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:52,499 INFO L482 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-06-05 14:03:52,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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) [2021-06-05 14:03:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-06-05 14:03:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:52,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:52,540 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:52,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9978,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:52,741 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-06-05 14:03:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:52,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899031250] [2021-06-05 14:03:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:52,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899031250] [2021-06-05 14:03:52,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899031250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986263341] [2021-06-05 14:03:52,844 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 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 [2021-06-05 14:03:52,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:03:52,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:53,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986263341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:53,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:53,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 14:03:53,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627042746] [2021-06-05 14:03:53,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:53,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:53,375 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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) [2021-06-05 14:03:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:54,137 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-06-05 14:03:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 22 [2021-06-05 14:03:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:54,440 INFO L225 Difference]: With dead ends: 131498 [2021-06-05 14:03:54,440 INFO L226 Difference]: Without dead ends: 131498 [2021-06-05 14:03:54,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:03:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-06-05 14:03:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-06-05 14:03:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-06-05 14:03:57,400 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-06-05 14:03:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:57,401 INFO L482 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-06-05 14:03:57,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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) [2021-06-05 14:03:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-06-05 14:03:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:03:57,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:57,446 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:57,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9979,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:57,649 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-06-05 14:03:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:57,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367455617] [2021-06-05 14:03:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:57,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:57,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367455617] [2021-06-05 14:03:57,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367455617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:57,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144094182] [2021-06-05 14:03:57,742 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 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 [2021-06-05 14:03:57,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:03:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:03:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144094182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:57,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:57,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 14:03:57,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232758784] [2021-06-05 14:03:57,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:03:57,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:03:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:03:57,842 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 transitions. Second operand has 20 states, 20 states have (on average 1.45) 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) [2021-06-05 14:03:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:59,088 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-06-05 14:03:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:03:59,088 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) 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 22 [2021-06-05 14:03:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:59,406 INFO L225 Difference]: With dead ends: 132410 [2021-06-05 14:03:59,406 INFO L226 Difference]: Without dead ends: 132410 [2021-06-05 14:03:59,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:03:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-06-05 14:04:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-06-05 14:04:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-06-05 14:04:02,342 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-06-05 14:04:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:02,342 INFO L482 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-06-05 14:04:02,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) 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) [2021-06-05 14:04:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-06-05 14:04:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:04:02,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:02,383 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:02,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9980,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:02,592 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-06-05 14:04:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:02,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623369385] [2021-06-05 14:04:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:02,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623369385] [2021-06-05 14:04:02,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623369385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750257017] [2021-06-05 14:04:02,689 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 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 [2021-06-05 14:04:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:04:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750257017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:02,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 14:04:02,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401646564] [2021-06-05 14:04:02,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:04:02,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:04:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:02,785 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 transitions. Second operand has 20 states, 20 states have (on average 1.45) 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) [2021-06-05 14:04:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:04,036 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-06-05 14:04:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:04:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) 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 22 [2021-06-05 14:04:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:04,342 INFO L225 Difference]: With dead ends: 132757 [2021-06-05 14:04:04,342 INFO L226 Difference]: Without dead ends: 132757 [2021-06-05 14:04:04,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:04:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-06-05 14:04:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-06-05 14:04:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-06-05 14:04:07,206 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-06-05 14:04:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:07,206 INFO L482 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-06-05 14:04:07,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) 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) [2021-06-05 14:04:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-06-05 14:04:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:04:07,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:07,252 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:07,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9981 [2021-06-05 14:04:07,452 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-06-05 14:04:07,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:07,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980792745] [2021-06-05 14:04:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:07,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980792745] [2021-06-05 14:04:07,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980792745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122270026] [2021-06-05 14:04:07,550 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 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 [2021-06-05 14:04:07,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:07,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:07,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:04:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:07,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122270026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:07,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 14:04:07,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626049211] [2021-06-05 14:04:07,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:07,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:07,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:07,670 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) 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) [2021-06-05 14:04:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:08,967 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-06-05 14:04:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 14:04:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) 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 22 [2021-06-05 14:04:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:09,256 INFO L225 Difference]: With dead ends: 135540 [2021-06-05 14:04:09,257 INFO L226 Difference]: Without dead ends: 135540 [2021-06-05 14:04:09,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:04:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-06-05 14:04:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-06-05 14:04:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-06-05 14:04:12,083 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-06-05 14:04:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:12,083 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-06-05 14:04:12,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) 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) [2021-06-05 14:04:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-06-05 14:04:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:12,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:12,139 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:12,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9982,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:12,339 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:12,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-06-05 14:04:12,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:12,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079115919] [2021-06-05 14:04:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:12,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079115919] [2021-06-05 14:04:12,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079115919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926276697] [2021-06-05 14:04:12,447 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 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 [2021-06-05 14:04:12,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:04:12,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:12,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:04:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926276697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:12,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 14:04:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72949300] [2021-06-05 14:04:12,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:04:12,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:04:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:12,543 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:13,636 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-06-05 14:04:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:04:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:13,936 INFO L225 Difference]: With dead ends: 131316 [2021-06-05 14:04:13,937 INFO L226 Difference]: Without dead ends: 131310 [2021-06-05 14:04:13,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:04:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-06-05 14:04:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-06-05 14:04:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-06-05 14:04:17,029 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-06-05 14:04:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:17,029 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-06-05 14:04:17,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-06-05 14:04:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:17,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:17,085 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:17,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9983 [2021-06-05 14:04:17,285 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-06-05 14:04:17,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:17,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861146564] [2021-06-05 14:04:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:17,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861146564] [2021-06-05 14:04:17,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861146564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828439792] [2021-06-05 14:04:17,372 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 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 [2021-06-05 14:04:17,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:17,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:04:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828439792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:17,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-06-05 14:04:17,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022800370] [2021-06-05 14:04:17,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:04:17,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:04:17,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:17,492 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:18,728 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-06-05 14:04:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:18,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:04:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:19,063 INFO L225 Difference]: With dead ends: 131229 [2021-06-05 14:04:19,063 INFO L226 Difference]: Without dead ends: 131229 [2021-06-05 14:04:19,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:04:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-06-05 14:04:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-06-05 14:04:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-06-05 14:04:22,091 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-06-05 14:04:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:22,091 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-06-05 14:04:22,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-06-05 14:04:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:22,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:22,150 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:22,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9984 [2021-06-05 14:04:22,350 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-06-05 14:04:22,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:22,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456026252] [2021-06-05 14:04:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:22,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:22,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456026252] [2021-06-05 14:04:22,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456026252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:22,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650811841] [2021-06-05 14:04:22,432 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 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 [2021-06-05 14:04:22,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:04:22,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:22,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:04:22,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650811841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:22,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:22,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-06-05 14:04:22,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868466078] [2021-06-05 14:04:22,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:04:22,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:04:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:22,538 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:23,783 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-06-05 14:04:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:23,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:04:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:24,154 INFO L225 Difference]: With dead ends: 131237 [2021-06-05 14:04:24,154 INFO L226 Difference]: Without dead ends: 131237 [2021-06-05 14:04:24,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:04:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-06-05 14:04:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-06-05 14:04:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-06-05 14:04:27,042 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-06-05 14:04:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:27,042 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-06-05 14:04:27,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-06-05 14:04:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:27,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:27,099 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:27,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9985 [2021-06-05 14:04:27,299 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:27,299 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-06-05 14:04:27,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:27,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753795544] [2021-06-05 14:04:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:27,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753795544] [2021-06-05 14:04:27,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753795544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255534143] [2021-06-05 14:04:27,383 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 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 [2021-06-05 14:04:27,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:04:27,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:04:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255534143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:27,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:04:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470658239] [2021-06-05 14:04:27,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:04:27,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:04:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:27,457 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:28,110 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-06-05 14:04:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:04:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:29,047 INFO L225 Difference]: With dead ends: 131154 [2021-06-05 14:04:29,047 INFO L226 Difference]: Without dead ends: 131153 [2021-06-05 14:04:29,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-06-05 14:04:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-06-05 14:04:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-06-05 14:04:31,844 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-06-05 14:04:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:31,844 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-06-05 14:04:31,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-06-05 14:04:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:31,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:31,896 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:32,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9986 [2021-06-05 14:04:32,096 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-06-05 14:04:32,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:32,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308855717] [2021-06-05 14:04:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:32,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308855717] [2021-06-05 14:04:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308855717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521459962] [2021-06-05 14:04:32,160 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 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 [2021-06-05 14:04:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:04:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:32,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521459962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:32,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:32,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:32,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791402016] [2021-06-05 14:04:32,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:32,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:32,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:32,233 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:04:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:32,795 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-06-05 14:04:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-06-05 14:04:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:33,059 INFO L225 Difference]: With dead ends: 131454 [2021-06-05 14:04:33,059 INFO L226 Difference]: Without dead ends: 131452 [2021-06-05 14:04:33,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-06-05 14:04:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-06-05 14:04:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-06-05 14:04:36,555 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-06-05 14:04:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:36,556 INFO L482 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-06-05 14:04:36,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:04:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-06-05 14:04:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:36,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:36,604 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:36,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9987,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:36,805 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-06-05 14:04:36,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:36,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012984499] [2021-06-05 14:04:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:36,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:36,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012984499] [2021-06-05 14:04:36,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012984499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681762585] [2021-06-05 14:04:36,868 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 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 [2021-06-05 14:04:36,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:36,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:04:36,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:36,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681762585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:36,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 14:04:36,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383042403] [2021-06-05 14:04:36,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:36,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:36,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:36,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:36,952 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 14:04:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:37,587 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-06-05 14:04:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-06-05 14:04:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:37,869 INFO L225 Difference]: With dead ends: 131473 [2021-06-05 14:04:37,869 INFO L226 Difference]: Without dead ends: 131464 [2021-06-05 14:04:37,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-06-05 14:04:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-06-05 14:04:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-06-05 14:04:41,383 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-06-05 14:04:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:41,383 INFO L482 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-06-05 14:04:41,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 14:04:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-06-05 14:04:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:41,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:41,446 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:41,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9988,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:41,653 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-06-05 14:04:41,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:41,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710654804] [2021-06-05 14:04:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:41,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:41,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710654804] [2021-06-05 14:04:41,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710654804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:41,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067244768] [2021-06-05 14:04:41,723 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 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 [2021-06-05 14:04:41,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:04:41,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:41,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:04:41,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067244768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:41,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:41,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:04:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647592947] [2021-06-05 14:04:41,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:41,794 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-06-05 14:04:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:42,334 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-06-05 14:04:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 24 [2021-06-05 14:04:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:42,610 INFO L225 Difference]: With dead ends: 131345 [2021-06-05 14:04:42,610 INFO L226 Difference]: Without dead ends: 131343 [2021-06-05 14:04:42,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-06-05 14:04:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-06-05 14:04:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-06-05 14:04:45,635 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-06-05 14:04:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:45,635 INFO L482 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-06-05 14:04:45,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-06-05 14:04:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-06-05 14:04:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:45,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:45,685 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:45,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9989,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:45,885 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:45,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-06-05 14:04:45,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:45,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548860639] [2021-06-05 14:04:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:46,345 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 14:04:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:46,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:46,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548860639] [2021-06-05 14:04:46,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548860639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065926045] [2021-06-05 14:04:46,445 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 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 [2021-06-05 14:04:46,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:46,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:04:46,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:46,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065926045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:46,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 14:04:46,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680866402] [2021-06-05 14:04:46,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:04:46,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:46,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:04:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:46,570 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:04:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:47,239 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-06-05 14:04:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:04:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-06-05 14:04:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:47,521 INFO L225 Difference]: With dead ends: 131339 [2021-06-05 14:04:47,521 INFO L226 Difference]: Without dead ends: 131336 [2021-06-05 14:04:47,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:04:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-06-05 14:04:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-06-05 14:04:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-06-05 14:04:50,392 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-06-05 14:04:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:50,392 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-06-05 14:04:50,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:04:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-06-05 14:04:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:50,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:50,439 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:50,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9990 [2021-06-05 14:04:50,640 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-06-05 14:04:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:50,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510506117] [2021-06-05 14:04:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:50,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510506117] [2021-06-05 14:04:50,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510506117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636523752] [2021-06-05 14:04:50,735 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 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 [2021-06-05 14:04:50,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:04:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:04:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:50,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636523752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:50,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 14:04:50,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154219464] [2021-06-05 14:04:50,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:04:50,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:50,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:04:50,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:50,804 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:04:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:52,307 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-06-05 14:04:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:04:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:04:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:52,686 INFO L225 Difference]: With dead ends: 131264 [2021-06-05 14:04:52,686 INFO L226 Difference]: Without dead ends: 131259 [2021-06-05 14:04:52,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:04:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-06-05 14:04:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-06-05 14:04:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-06-05 14:04:55,462 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-06-05 14:04:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:55,463 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-06-05 14:04:55,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:04:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-06-05 14:04:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:55,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:55,515 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:55,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9991 [2021-06-05 14:04:55,716 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:55,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-06-05 14:04:55,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:55,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717650290] [2021-06-05 14:04:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:55,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:55,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717650290] [2021-06-05 14:04:55,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717650290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447882756] [2021-06-05 14:04:55,776 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 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 [2021-06-05 14:04:55,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:04:55,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:04:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:55,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447882756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:55,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:55,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137399099] [2021-06-05 14:04:55,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:55,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:55,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:55,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:55,850 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:04:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:56,407 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-06-05 14:04:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-06-05 14:04:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:57,261 INFO L225 Difference]: With dead ends: 131472 [2021-06-05 14:04:57,261 INFO L226 Difference]: Without dead ends: 131470 [2021-06-05 14:04:57,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-06-05 14:04:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-06-05 14:04:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-06-05 14:04:59,846 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-06-05 14:04:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:59,846 INFO L482 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-06-05 14:04:59,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:04:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-06-05 14:04:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:04:59,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:59,893 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:00,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9992,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:00,097 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-06-05 14:05:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:00,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858164459] [2021-06-05 14:05:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:00,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:00,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858164459] [2021-06-05 14:05:00,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858164459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563883252] [2021-06-05 14:05:00,163 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 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 [2021-06-05 14:05:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:05:00,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:05:00,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563883252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:00,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 14:05:00,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278961899] [2021-06-05 14:05:00,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:00,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:00,235 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 14:05:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:00,806 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-06-05 14:05:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:05:00,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-06-05 14:05:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:01,077 INFO L225 Difference]: With dead ends: 131509 [2021-06-05 14:05:01,077 INFO L226 Difference]: Without dead ends: 131502 [2021-06-05 14:05:01,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:05:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-06-05 14:05:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-06-05 14:05:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-06-05 14:05:04,578 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-06-05 14:05:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:04,578 INFO L482 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-06-05 14:05:04,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 14:05:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-06-05 14:05:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:04,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:04,630 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:04,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9993 [2021-06-05 14:05:04,831 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:04,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-06-05 14:05:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:04,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598525633] [2021-06-05 14:05:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:04,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:04,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598525633] [2021-06-05 14:05:04,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598525633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549226123] [2021-06-05 14:05:04,896 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 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 [2021-06-05 14:05:04,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:05:04,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:05:04,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549226123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:04,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-06-05 14:05:04,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574278406] [2021-06-05 14:05:04,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:04,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:04,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:04,985 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:05:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:05,671 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-06-05 14:05:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:05:05,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-06-05 14:05:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:05,984 INFO L225 Difference]: With dead ends: 131510 [2021-06-05 14:05:05,985 INFO L226 Difference]: Without dead ends: 131508 [2021-06-05 14:05:05,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:05:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-06-05 14:05:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-06-05 14:05:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-06-05 14:05:09,517 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-06-05 14:05:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:09,517 INFO L482 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-06-05 14:05:09,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:05:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-06-05 14:05:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:09,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:09,563 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:09,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9994 [2021-06-05 14:05:09,764 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:09,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-06-05 14:05:09,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:09,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073380676] [2021-06-05 14:05:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073380676] [2021-06-05 14:05:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073380676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546902473] [2021-06-05 14:05:09,837 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 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 [2021-06-05 14:05:09,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:05:09,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:05:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546902473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:09,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:09,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800207818] [2021-06-05 14:05:09,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:09,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:09,906 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:10,543 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-06-05 14:05:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:05:10,543 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:05:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:10,838 INFO L225 Difference]: With dead ends: 131365 [2021-06-05 14:05:10,838 INFO L226 Difference]: Without dead ends: 131362 [2021-06-05 14:05:10,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:05:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-06-05 14:05:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-06-05 14:05:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-06-05 14:05:13,809 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-06-05 14:05:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:13,809 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-06-05 14:05:13,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-06-05 14:05:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:13,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:13,856 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:14,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9995 [2021-06-05 14:05:14,057 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-06-05 14:05:14,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:14,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192676916] [2021-06-05 14:05:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:14,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:14,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192676916] [2021-06-05 14:05:14,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192676916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:14,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921022972] [2021-06-05 14:05:14,590 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 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 [2021-06-05 14:05:14,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:14,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:14,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:05:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:05:14,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921022972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:14,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:14,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 14:05:14,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414737462] [2021-06-05 14:05:14,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:14,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:14,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:14,702 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:05:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:15,383 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-06-05 14:05:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:05:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:05:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:15,685 INFO L225 Difference]: With dead ends: 131356 [2021-06-05 14:05:15,685 INFO L226 Difference]: Without dead ends: 131351 [2021-06-05 14:05:15,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:05:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-06-05 14:05:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-06-05 14:05:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-06-05 14:05:18,724 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-06-05 14:05:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:18,724 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-06-05 14:05:18,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:05:18,725 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-06-05 14:05:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:18,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:18,776 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9996 [2021-06-05 14:05:18,977 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-06-05 14:05:18,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483604107] [2021-06-05 14:05:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:19,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:19,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483604107] [2021-06-05 14:05:19,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483604107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:19,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176814152] [2021-06-05 14:05:19,057 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 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 [2021-06-05 14:05:19,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 14:05:19,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:05:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:05:19,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176814152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:19,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:19,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 14:05:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364241315] [2021-06-05 14:05:19,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:19,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:19,126 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:05:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:20,260 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-06-05 14:05:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:05:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:20,555 INFO L225 Difference]: With dead ends: 131372 [2021-06-05 14:05:20,556 INFO L226 Difference]: Without dead ends: 131369 [2021-06-05 14:05:20,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-06-05 14:05:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-06-05 14:05:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-06-05 14:05:23,554 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-06-05 14:05:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:23,554 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-06-05 14:05:23,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:05:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-06-05 14:05:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:23,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:23,607 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:23,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9997,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:23,807 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-06-05 14:05:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:23,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112143341] [2021-06-05 14:05:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:05:23,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112143341] [2021-06-05 14:05:23,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112143341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950963420] [2021-06-05 14:05:23,866 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 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 [2021-06-05 14:05:23,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:05:23,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:05:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:05:23,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950963420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:23,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:23,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:05:23,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083422873] [2021-06-05 14:05:23,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:05:23,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:05:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:05:23,939 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:05:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:25,076 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-06-05 14:05:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:05:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-06-05 14:05:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:25,389 INFO L225 Difference]: With dead ends: 131414 [2021-06-05 14:05:25,389 INFO L226 Difference]: Without dead ends: 131412 [2021-06-05 14:05:25,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:05:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-06-05 14:05:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-06-05 14:05:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-06-05 14:05:28,212 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-06-05 14:05:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:28,212 INFO L482 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-06-05 14:05:28,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:05:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-06-05 14:05:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:28,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:28,263 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:28,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9998 [2021-06-05 14:05:28,463 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-06-05 14:05:28,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:28,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752393857] [2021-06-05 14:05:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:28,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752393857] [2021-06-05 14:05:28,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752393857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482482108] [2021-06-05 14:05:28,522 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 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 [2021-06-05 14:05:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:05:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:05:28,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482482108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:28,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:28,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 14:05:28,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070892810] [2021-06-05 14:05:28,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:28,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:28,591 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 14:05:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:29,801 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-06-05 14:05:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:29,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 24 [2021-06-05 14:05:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:30,131 INFO L225 Difference]: With dead ends: 131457 [2021-06-05 14:05:30,131 INFO L226 Difference]: Without dead ends: 131452 [2021-06-05 14:05:30,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-06-05 14:05:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-06-05 14:05:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-06-05 14:05:32,915 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-06-05 14:05:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:32,915 INFO L482 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-06-05 14:05:32,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 14:05:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-06-05 14:05:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:32,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:32,967 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:33,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9999,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:33,168 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-06-05 14:05:33,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:33,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762058590] [2021-06-05 14:05:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:33,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762058590] [2021-06-05 14:05:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762058590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426257311] [2021-06-05 14:05:33,233 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 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 [2021-06-05 14:05:33,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:05:33,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:05:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426257311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:33,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:33,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-06-05 14:05:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930416213] [2021-06-05 14:05:33,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:33,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:33,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:33,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:33,302 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:05:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:33,914 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-06-05 14:05:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:05:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-06-05 14:05:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:34,219 INFO L225 Difference]: With dead ends: 131477 [2021-06-05 14:05:34,219 INFO L226 Difference]: Without dead ends: 131475 [2021-06-05 14:05:34,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-06-05 14:05:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-06-05 14:05:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-06-05 14:05:37,703 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-06-05 14:05:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:37,703 INFO L482 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-06-05 14:05:37,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:05:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-06-05 14:05:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:37,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:37,758 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:37,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10000 [2021-06-05 14:05:37,958 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:37,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-06-05 14:05:37,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:37,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777714302] [2021-06-05 14:05:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:38,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777714302] [2021-06-05 14:05:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777714302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895389058] [2021-06-05 14:05:38,031 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 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 [2021-06-05 14:05:38,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:05:38,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:38,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:05:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:38,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895389058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:38,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:38,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:38,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663114741] [2021-06-05 14:05:38,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:38,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:38,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:38,098 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:38,781 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-06-05 14:05:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:05:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:05:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:39,118 INFO L225 Difference]: With dead ends: 131340 [2021-06-05 14:05:39,118 INFO L226 Difference]: Without dead ends: 131337 [2021-06-05 14:05:39,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:05:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-06-05 14:05:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-06-05 14:05:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-06-05 14:05:42,697 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-06-05 14:05:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:42,697 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-06-05 14:05:42,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-06-05 14:05:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:42,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:42,752 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:42,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10001,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:42,952 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-06-05 14:05:42,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:42,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963928631] [2021-06-05 14:05:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:43,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:43,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963928631] [2021-06-05 14:05:43,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963928631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:43,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830035902] [2021-06-05 14:05:43,037 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 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 [2021-06-05 14:05:43,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:05:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:05:43,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830035902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:43,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:43,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 14:05:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926366444] [2021-06-05 14:05:43,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:43,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:43,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:43,099 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:05:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:43,798 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-06-05 14:05:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:05:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:05:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:44,108 INFO L225 Difference]: With dead ends: 131338 [2021-06-05 14:05:44,108 INFO L226 Difference]: Without dead ends: 131333 [2021-06-05 14:05:44,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:05:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-06-05 14:05:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-06-05 14:05:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-06-05 14:05:47,700 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-06-05 14:05:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:47,700 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-06-05 14:05:47,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:05:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-06-05 14:05:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:47,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:47,784 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:47,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10002 [2021-06-05 14:05:47,984 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-06-05 14:05:47,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:47,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251015552] [2021-06-05 14:05:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:48,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251015552] [2021-06-05 14:05:48,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251015552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651682609] [2021-06-05 14:05:48,068 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 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 [2021-06-05 14:05:48,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 14:05:48,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:48,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:05:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651682609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:48,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:48,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:05:48,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320192974] [2021-06-05 14:05:48,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:48,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:48,138 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:48,768 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-06-05 14:05:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:48,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:05:48,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:49,088 INFO L225 Difference]: With dead ends: 131408 [2021-06-05 14:05:49,088 INFO L226 Difference]: Without dead ends: 131405 [2021-06-05 14:05:49,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-06-05 14:05:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-06-05 14:05:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-06-05 14:05:52,164 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-06-05 14:05:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:52,164 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-06-05 14:05:52,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-06-05 14:05:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:52,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:52,216 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:52,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10003,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:52,417 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-06-05 14:05:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:52,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607724767] [2021-06-05 14:05:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:52,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:52,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607724767] [2021-06-05 14:05:52,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607724767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:52,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504676325] [2021-06-05 14:05:52,525 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 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 [2021-06-05 14:05:52,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 14:05:52,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:52,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:05:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:52,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504676325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:52,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:52,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:05:52,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961161757] [2021-06-05 14:05:52,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:52,602 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:53,774 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-06-05 14:05:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:05:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:05:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:54,111 INFO L225 Difference]: With dead ends: 131400 [2021-06-05 14:05:54,111 INFO L226 Difference]: Without dead ends: 131396 [2021-06-05 14:05:54,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-06-05 14:05:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-06-05 14:05:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-06-05 14:05:57,077 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-06-05 14:05:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:57,078 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-06-05 14:05:57,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-06-05 14:05:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:05:57,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:57,127 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:57,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10004 [2021-06-05 14:05:57,327 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-06-05 14:05:57,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:57,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121458504] [2021-06-05 14:05:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:57,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:57,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121458504] [2021-06-05 14:05:57,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121458504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:57,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018882130] [2021-06-05 14:05:57,402 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 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 [2021-06-05 14:05:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:05:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:05:57,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018882130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:57,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:57,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 14:05:57,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837017199] [2021-06-05 14:05:57,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:57,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:57,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:57,465 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 14:05:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:59,002 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-06-05 14:05:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 24 [2021-06-05 14:05:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:59,451 INFO L225 Difference]: With dead ends: 131360 [2021-06-05 14:05:59,451 INFO L226 Difference]: Without dead ends: 131357 [2021-06-05 14:05:59,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-06-05 14:06:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-06-05 14:06:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-06-05 14:06:02,323 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-06-05 14:06:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:02,323 INFO L482 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-06-05 14:06:02,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-06-05 14:06:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-06-05 14:06:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:02,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:02,372 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:02,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10005 [2021-06-05 14:06:02,573 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-06-05 14:06:02,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:02,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568480726] [2021-06-05 14:06:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:02,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:02,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568480726] [2021-06-05 14:06:02,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568480726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:02,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739770731] [2021-06-05 14:06:02,655 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 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 [2021-06-05 14:06:02,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:02,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:06:02,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:06:02,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739770731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:02,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:02,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 14:06:02,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072456594] [2021-06-05 14:06:02,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:02,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:02,717 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:06:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:03,390 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-06-05 14:06:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:06:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:04,285 INFO L225 Difference]: With dead ends: 131311 [2021-06-05 14:06:04,285 INFO L226 Difference]: Without dead ends: 131308 [2021-06-05 14:06:04,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:06:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-06-05 14:06:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-06-05 14:06:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-06-05 14:06:07,109 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-06-05 14:06:07,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:07,109 INFO L482 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-06-05 14:06:07,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:06:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-06-05 14:06:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:07,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:07,160 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:07,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10006 [2021-06-05 14:06:07,361 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-06-05 14:06:07,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:07,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357387716] [2021-06-05 14:06:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:07,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:07,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357387716] [2021-06-05 14:06:07,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357387716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:07,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407761224] [2021-06-05 14:06:07,460 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 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 [2021-06-05 14:06:07,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:06:07,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:06:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:07,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407761224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:07,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:07,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:06:07,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553271575] [2021-06-05 14:06:07,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:07,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:07,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:07,530 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:08,219 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-06-05 14:06:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:08,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:06:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:08,522 INFO L225 Difference]: With dead ends: 131552 [2021-06-05 14:06:08,522 INFO L226 Difference]: Without dead ends: 131544 [2021-06-05 14:06:08,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:06:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-06-05 14:06:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-06-05 14:06:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-06-05 14:06:11,992 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-06-05 14:06:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:11,993 INFO L482 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-06-05 14:06:11,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-06-05 14:06:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:12,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:12,049 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:12,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10007,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:12,249 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-06-05 14:06:12,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:12,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611236641] [2021-06-05 14:06:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:06:12,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:12,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611236641] [2021-06-05 14:06:12,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611236641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:12,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002228819] [2021-06-05 14:06:12,306 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 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 [2021-06-05 14:06:12,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:12,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:06:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:06:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002228819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:12,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:12,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:06:12,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546837953] [2021-06-05 14:06:12,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:06:12,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:12,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:06:12,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:06:12,376 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:06:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:12,924 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-06-05 14:06:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:06:12,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-06-05 14:06:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:13,239 INFO L225 Difference]: With dead ends: 131378 [2021-06-05 14:06:13,240 INFO L226 Difference]: Without dead ends: 131378 [2021-06-05 14:06:13,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-06-05 14:06:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-06-05 14:06:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-06-05 14:06:17,000 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-06-05 14:06:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:17,000 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-06-05 14:06:17,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-06-05 14:06:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-06-05 14:06:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:17,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:17,058 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:17,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10008 [2021-06-05 14:06:17,259 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-06-05 14:06:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:17,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971321310] [2021-06-05 14:06:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:06:17,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971321310] [2021-06-05 14:06:17,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971321310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244620980] [2021-06-05 14:06:17,315 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 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 [2021-06-05 14:06:17,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:06:17,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:06:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:06:17,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244620980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:17,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:17,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 14:06:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90394564] [2021-06-05 14:06:17,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:06:17,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:06:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:06:17,386 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-06-05 14:06:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:17,959 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-06-05 14:06:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:06:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 24 [2021-06-05 14:06:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:18,275 INFO L225 Difference]: With dead ends: 131464 [2021-06-05 14:06:18,275 INFO L226 Difference]: Without dead ends: 131461 [2021-06-05 14:06:18,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:06:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-06-05 14:06:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-06-05 14:06:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-06-05 14:06:21,421 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-06-05 14:06:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:21,421 INFO L482 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-06-05 14:06:21,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-06-05 14:06:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-06-05 14:06:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:21,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:21,475 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:21,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10009,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:21,676 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-06-05 14:06:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:21,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303767522] [2021-06-05 14:06:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:21,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:21,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303767522] [2021-06-05 14:06:21,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303767522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:21,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432371704] [2021-06-05 14:06:21,747 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 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 [2021-06-05 14:06:21,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:06:21,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:21,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:06:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:22,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432371704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:22,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:22,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:06:22,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127233590] [2021-06-05 14:06:22,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:06:22,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:22,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:06:22,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:06:22,275 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:22,984 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-06-05 14:06:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:22,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:06:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:23,273 INFO L225 Difference]: With dead ends: 131365 [2021-06-05 14:06:23,274 INFO L226 Difference]: Without dead ends: 131358 [2021-06-05 14:06:23,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:06:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. [2021-06-05 14:06:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131358 to 131081. [2021-06-05 14:06:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131080 states have (on average 3.0275785779676534) internal successors, (396855), 131080 states have internal predecessors, (396855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 396855 transitions. [2021-06-05 14:06:26,396 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 396855 transitions. Word has length 24 [2021-06-05 14:06:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:26,396 INFO L482 AbstractCegarLoop]: Abstraction has 131081 states and 396855 transitions. [2021-06-05 14:06:26,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 396855 transitions. [2021-06-05 14:06:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:26,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:26,449 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:26,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10010,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:26,649 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash -369745168, now seen corresponding path program 301 times [2021-06-05 14:06:26,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:26,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415153278] [2021-06-05 14:06:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:06:26,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:26,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415153278] [2021-06-05 14:06:26,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415153278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:26,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773353413] [2021-06-05 14:06:26,721 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 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 [2021-06-05 14:06:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:26,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:06:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:06:26,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773353413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:26,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:26,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 14:06:26,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738707085] [2021-06-05 14:06:26,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:26,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:26,788 INFO L87 Difference]: Start difference. First operand 131081 states and 396855 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:06:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:27,963 INFO L93 Difference]: Finished difference Result 131320 states and 397204 transitions. [2021-06-05 14:06:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:06:27,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:06:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:28,269 INFO L225 Difference]: With dead ends: 131320 [2021-06-05 14:06:28,269 INFO L226 Difference]: Without dead ends: 131315 [2021-06-05 14:06:28,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:06:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131315 states. [2021-06-05 14:06:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131315 to 131074. [2021-06-05 14:06:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 3.0273053947037147) internal successors, (396798), 131073 states have internal predecessors, (396798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 396798 transitions. [2021-06-05 14:06:31,247 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 396798 transitions. Word has length 24 [2021-06-05 14:06:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:31,247 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 396798 transitions. [2021-06-05 14:06:31,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:06:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 396798 transitions. [2021-06-05 14:06:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:31,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:31,297 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:31,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10011 [2021-06-05 14:06:31,497 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:31,498 INFO L82 PathProgramCache]: Analyzing trace with hash 724346420, now seen corresponding path program 302 times [2021-06-05 14:06:31,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:31,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445123460] [2021-06-05 14:06:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:31,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:31,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445123460] [2021-06-05 14:06:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445123460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:31,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124519296] [2021-06-05 14:06:31,584 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 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 [2021-06-05 14:06:31,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:31,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:06:31,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:06:31,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124519296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:31,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:31,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 14:06:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165963281] [2021-06-05 14:06:31,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:31,652 INFO L87 Difference]: Start difference. First operand 131074 states and 396798 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:06:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:32,884 INFO L93 Difference]: Finished difference Result 131318 states and 397153 transitions. [2021-06-05 14:06:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:06:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:06:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:33,208 INFO L225 Difference]: With dead ends: 131318 [2021-06-05 14:06:33,208 INFO L226 Difference]: Without dead ends: 131312 [2021-06-05 14:06:33,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:06:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131312 states. [2021-06-05 14:06:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131312 to 131075. [2021-06-05 14:06:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131075 states, 131074 states have (on average 3.026984756702321) internal successors, (396759), 131074 states have internal predecessors, (396759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131075 states to 131075 states and 396759 transitions. [2021-06-05 14:06:36,091 INFO L78 Accepts]: Start accepts. Automaton has 131075 states and 396759 transitions. Word has length 24 [2021-06-05 14:06:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:36,091 INFO L482 AbstractCegarLoop]: Abstraction has 131075 states and 396759 transitions. [2021-06-05 14:06:36,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:06:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 131075 states and 396759 transitions. [2021-06-05 14:06:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:36,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:36,144 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:36,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10012 [2021-06-05 14:06:36,344 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash 281447280, now seen corresponding path program 303 times [2021-06-05 14:06:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:36,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346566729] [2021-06-05 14:06:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:36,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:36,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346566729] [2021-06-05 14:06:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346566729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:36,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720803] [2021-06-05 14:06:36,430 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 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 [2021-06-05 14:06:36,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:06:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:36,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:06:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:36,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:36,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:36,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:06:36,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18816255] [2021-06-05 14:06:36,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:36,504 INFO L87 Difference]: Start difference. First operand 131075 states and 396759 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:06:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:37,805 INFO L93 Difference]: Finished difference Result 131674 states and 397979 transitions. [2021-06-05 14:06:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:06:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 24 [2021-06-05 14:06:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:38,147 INFO L225 Difference]: With dead ends: 131674 [2021-06-05 14:06:38,147 INFO L226 Difference]: Without dead ends: 131666 [2021-06-05 14:06:38,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:06:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2021-06-05 14:06:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131083. [2021-06-05 14:06:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131083 states, 131082 states have (on average 3.026937336934133) internal successors, (396777), 131082 states have internal predecessors, (396777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131083 states to 131083 states and 396777 transitions. [2021-06-05 14:06:40,886 INFO L78 Accepts]: Start accepts. Automaton has 131083 states and 396777 transitions. Word has length 24 [2021-06-05 14:06:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:40,886 INFO L482 AbstractCegarLoop]: Abstraction has 131083 states and 396777 transitions. [2021-06-05 14:06:40,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:06:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 131083 states and 396777 transitions. [2021-06-05 14:06:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:40,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:40,942 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:41,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10013 [2021-06-05 14:06:41,145 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash -563524172, now seen corresponding path program 304 times [2021-06-05 14:06:41,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:41,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774521908] [2021-06-05 14:06:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:41,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:41,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774521908] [2021-06-05 14:06:41,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774521908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:41,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254973114] [2021-06-05 14:06:41,235 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 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 [2021-06-05 14:06:41,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:41,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:06:41,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:06:41,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254973114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:41,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:41,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 14:06:41,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442717897] [2021-06-05 14:06:41,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:41,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:41,303 INFO L87 Difference]: Start difference. First operand 131083 states and 396777 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:06:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:42,008 INFO L93 Difference]: Finished difference Result 131661 states and 397955 transitions. [2021-06-05 14:06:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:06:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:06:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:42,845 INFO L225 Difference]: With dead ends: 131661 [2021-06-05 14:06:42,845 INFO L226 Difference]: Without dead ends: 131646 [2021-06-05 14:06:42,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:06:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131646 states. [2021-06-05 14:06:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131646 to 131092. [2021-06-05 14:06:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131092 states, 131091 states have (on average 3.0268515763858694) internal successors, (396793), 131091 states have internal predecessors, (396793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131092 states to 131092 states and 396793 transitions. [2021-06-05 14:06:45,688 INFO L78 Accepts]: Start accepts. Automaton has 131092 states and 396793 transitions. Word has length 24 [2021-06-05 14:06:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:45,688 INFO L482 AbstractCegarLoop]: Abstraction has 131092 states and 396793 transitions. [2021-06-05 14:06:45,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:06:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 131092 states and 396793 transitions. [2021-06-05 14:06:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:45,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:45,745 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:45,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10014 [2021-06-05 14:06:45,945 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1182382632, now seen corresponding path program 305 times [2021-06-05 14:06:45,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:45,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984057315] [2021-06-05 14:06:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:46,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:46,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984057315] [2021-06-05 14:06:46,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984057315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:46,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614481601] [2021-06-05 14:06:46,025 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 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 [2021-06-05 14:06:46,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:06:46,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:46,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:06:46,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:46,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614481601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:46,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:46,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:06:46,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005221239] [2021-06-05 14:06:46,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:46,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:46,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:46,092 INFO L87 Difference]: Start difference. First operand 131092 states and 396793 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:46,772 INFO L93 Difference]: Finished difference Result 131394 states and 397427 transitions. [2021-06-05 14:06:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:06:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:06:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:47,104 INFO L225 Difference]: With dead ends: 131394 [2021-06-05 14:06:47,104 INFO L226 Difference]: Without dead ends: 131390 [2021-06-05 14:06:47,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:06:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131390 states. [2021-06-05 14:06:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131390 to 131082. [2021-06-05 14:06:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0267544495388345) internal successors, (396750), 131081 states have internal predecessors, (396750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 396750 transitions. [2021-06-05 14:06:50,697 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 396750 transitions. Word has length 24 [2021-06-05 14:06:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:50,697 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 396750 transitions. [2021-06-05 14:06:50,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 396750 transitions. [2021-06-05 14:06:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:50,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:50,749 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:50,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10015 [2021-06-05 14:06:50,950 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash 545915778, now seen corresponding path program 306 times [2021-06-05 14:06:50,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:50,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072558447] [2021-06-05 14:06:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:51,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072558447] [2021-06-05 14:06:51,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072558447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140855190] [2021-06-05 14:06:51,041 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 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 [2021-06-05 14:06:51,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:06:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:06:51,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:51,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140855190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:51,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:51,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:06:51,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817613343] [2021-06-05 14:06:51,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:51,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:51,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:51,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:51,120 INFO L87 Difference]: Start difference. First operand 131082 states and 396750 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:06:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:51,796 INFO L93 Difference]: Finished difference Result 131351 states and 397199 transitions. [2021-06-05 14:06:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 24 [2021-06-05 14:06:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:52,119 INFO L225 Difference]: With dead ends: 131351 [2021-06-05 14:06:52,119 INFO L226 Difference]: Without dead ends: 131347 [2021-06-05 14:06:52,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:06:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131347 states. [2021-06-05 14:06:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131347 to 131079. [2021-06-05 14:06:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0264804162407115) internal successors, (396705), 131078 states have internal predecessors, (396705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 396705 transitions. [2021-06-05 14:06:55,677 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 396705 transitions. Word has length 24 [2021-06-05 14:06:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 396705 transitions. [2021-06-05 14:06:55,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:06:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 396705 transitions. [2021-06-05 14:06:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:06:55,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:55,722 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:55,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10016,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:55,922 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:55,922 INFO L82 PathProgramCache]: Analyzing trace with hash -299055674, now seen corresponding path program 307 times [2021-06-05 14:06:55,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:55,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445505247] [2021-06-05 14:06:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:56,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:56,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445505247] [2021-06-05 14:06:56,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445505247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:56,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196294914] [2021-06-05 14:06:56,008 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 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 [2021-06-05 14:06:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:06:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:06:56,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196294914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:56,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:56,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 14:06:56,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112599411] [2021-06-05 14:06:56,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:56,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:56,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:56,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:56,077 INFO L87 Difference]: Start difference. First operand 131079 states and 396705 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:06:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:56,740 INFO L93 Difference]: Finished difference Result 131763 states and 398113 transitions. [2021-06-05 14:06:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:06:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:06:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:57,032 INFO L225 Difference]: With dead ends: 131763 [2021-06-05 14:06:57,033 INFO L226 Difference]: Without dead ends: 131748 [2021-06-05 14:06:57,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:06:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131748 states. [2021-06-05 14:06:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131748 to 131119. [2021-06-05 14:06:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131119 states, 131118 states have (on average 3.0261825226132184) internal successors, (396787), 131118 states have internal predecessors, (396787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131119 states to 131119 states and 396787 transitions. [2021-06-05 14:07:00,492 INFO L78 Accepts]: Start accepts. Automaton has 131119 states and 396787 transitions. Word has length 24 [2021-06-05 14:07:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:00,492 INFO L482 AbstractCegarLoop]: Abstraction has 131119 states and 396787 transitions. [2021-06-05 14:07:00,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 131119 states and 396787 transitions. [2021-06-05 14:07:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:00,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:00,549 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:00,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10017 [2021-06-05 14:07:00,764 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:00,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2061667018, now seen corresponding path program 308 times [2021-06-05 14:07:00,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:00,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549895690] [2021-06-05 14:07:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:07:00,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:00,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549895690] [2021-06-05 14:07:00,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549895690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:00,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862892914] [2021-06-05 14:07:00,832 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 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 [2021-06-05 14:07:00,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:00,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:07:00,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862892914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:00,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:00,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 14:07:00,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584026248] [2021-06-05 14:07:00,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:00,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:00,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:00,924 INFO L87 Difference]: Start difference. First operand 131119 states and 396787 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-06-05 14:07:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:01,481 INFO L93 Difference]: Finished difference Result 131485 states and 397395 transitions. [2021-06-05 14:07:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:07:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 24 [2021-06-05 14:07:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:01,755 INFO L225 Difference]: With dead ends: 131485 [2021-06-05 14:07:01,755 INFO L226 Difference]: Without dead ends: 131485 [2021-06-05 14:07:01,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:07:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131485 states. [2021-06-05 14:07:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131485 to 131093. [2021-06-05 14:07:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.025852073353065) internal successors, (396665), 131092 states have internal predecessors, (396665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 396665 transitions. [2021-06-05 14:07:04,682 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 396665 transitions. Word has length 24 [2021-06-05 14:07:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:04,682 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 396665 transitions. [2021-06-05 14:07:04,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-06-05 14:07:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 396665 transitions. [2021-06-05 14:07:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:04,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:04,735 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:04,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10018 [2021-06-05 14:07:04,935 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1582794580, now seen corresponding path program 309 times [2021-06-05 14:07:04,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:04,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240241285] [2021-06-05 14:07:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:05,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:05,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240241285] [2021-06-05 14:07:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240241285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:05,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285203663] [2021-06-05 14:07:05,003 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 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 [2021-06-05 14:07:05,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:07:05,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:07:05,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:05,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285203663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:05,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:05,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:07:05,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624809944] [2021-06-05 14:07:05,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:07:05,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:07:05,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:07:05,078 INFO L87 Difference]: Start difference. First operand 131093 states and 396665 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:05,614 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 14:07:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:06,535 INFO L93 Difference]: Finished difference Result 131333 states and 397012 transitions. [2021-06-05 14:07:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:07:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:07:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:06,926 INFO L225 Difference]: With dead ends: 131333 [2021-06-05 14:07:06,926 INFO L226 Difference]: Without dead ends: 131328 [2021-06-05 14:07:06,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:07:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131328 states. [2021-06-05 14:07:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131328 to 131072. [2021-06-05 14:07:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0252458591145257) internal successors, (396522), 131071 states have internal predecessors, (396522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396522 transitions. [2021-06-05 14:07:09,684 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396522 transitions. Word has length 24 [2021-06-05 14:07:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:09,684 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396522 transitions. [2021-06-05 14:07:09,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396522 transitions. [2021-06-05 14:07:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:09,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:09,735 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:09,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10019,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:09,936 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1639087336, now seen corresponding path program 310 times [2021-06-05 14:07:09,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:09,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150169450] [2021-06-05 14:07:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:10,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:10,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150169450] [2021-06-05 14:07:10,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150169450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:10,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084046576] [2021-06-05 14:07:10,006 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 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 [2021-06-05 14:07:10,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:10,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:07:10,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084046576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:10,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:10,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 14:07:10,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703999068] [2021-06-05 14:07:10,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:10,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:10,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:10,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:10,074 INFO L87 Difference]: Start difference. First operand 131072 states and 396522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:07:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:10,699 INFO L93 Difference]: Finished difference Result 131314 states and 396874 transitions. [2021-06-05 14:07:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:07:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:07:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:11,507 INFO L225 Difference]: With dead ends: 131314 [2021-06-05 14:07:11,507 INFO L226 Difference]: Without dead ends: 131309 [2021-06-05 14:07:11,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131309 states. [2021-06-05 14:07:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131309 to 131072. [2021-06-05 14:07:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.024261659711149) internal successors, (396393), 131071 states have internal predecessors, (396393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396393 transitions. [2021-06-05 14:07:14,100 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396393 transitions. Word has length 24 [2021-06-05 14:07:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:14,100 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396393 transitions. [2021-06-05 14:07:14,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:07:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396393 transitions. [2021-06-05 14:07:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:14,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:14,147 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:14,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10020 [2021-06-05 14:07:14,348 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:14,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1561788372, now seen corresponding path program 311 times [2021-06-05 14:07:14,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:14,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015871101] [2021-06-05 14:07:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:14,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:14,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015871101] [2021-06-05 14:07:14,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015871101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151934775] [2021-06-05 14:07:14,421 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 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 [2021-06-05 14:07:14,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:07:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:07:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:14,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151934775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:14,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:14,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:07:14,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208541767] [2021-06-05 14:07:14,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:14,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:14,493 INFO L87 Difference]: Start difference. First operand 131072 states and 396393 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:15,065 INFO L93 Difference]: Finished difference Result 132743 states and 399958 transitions. [2021-06-05 14:07:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:15,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:07:15,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:15,342 INFO L225 Difference]: With dead ends: 132743 [2021-06-05 14:07:15,342 INFO L226 Difference]: Without dead ends: 132740 [2021-06-05 14:07:15,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:07:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-06-05 14:07:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131072. [2021-06-05 14:07:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0241853651837554) internal successors, (396383), 131071 states have internal predecessors, (396383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396383 transitions. [2021-06-05 14:07:18,648 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396383 transitions. Word has length 24 [2021-06-05 14:07:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:18,648 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396383 transitions. [2021-06-05 14:07:18,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396383 transitions. [2021-06-05 14:07:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:18,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:18,690 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:18,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10021,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:18,891 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:18,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2004687512, now seen corresponding path program 312 times [2021-06-05 14:07:18,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:18,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311287222] [2021-06-05 14:07:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:18,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311287222] [2021-06-05 14:07:18,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311287222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481420133] [2021-06-05 14:07:18,976 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 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 [2021-06-05 14:07:19,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:07:19,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:07:19,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:19,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481420133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:19,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:19,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:07:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498446965] [2021-06-05 14:07:19,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:19,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:19,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:19,048 INFO L87 Difference]: Start difference. First operand 131072 states and 396383 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:07:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:19,649 INFO L93 Difference]: Finished difference Result 132748 states and 399952 transitions. [2021-06-05 14:07:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:07:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 24 [2021-06-05 14:07:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:19,935 INFO L225 Difference]: With dead ends: 132748 [2021-06-05 14:07:19,935 INFO L226 Difference]: Without dead ends: 132740 [2021-06-05 14:07:19,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-06-05 14:07:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131124. [2021-06-05 14:07:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.0238097053911215) internal successors, (396491), 131123 states have internal predecessors, (396491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396491 transitions. [2021-06-05 14:07:23,331 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396491 transitions. Word has length 24 [2021-06-05 14:07:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:23,332 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396491 transitions. [2021-06-05 14:07:23,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:07:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396491 transitions. [2021-06-05 14:07:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:23,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:23,385 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:23,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-06-05 14:07:23,585 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1445308332, now seen corresponding path program 313 times [2021-06-05 14:07:23,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:23,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758985666] [2021-06-05 14:07:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:23,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758985666] [2021-06-05 14:07:23,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758985666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295842676] [2021-06-05 14:07:23,670 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 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 [2021-06-05 14:07:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:23,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:07:23,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295842676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:23,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:23,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 14:07:23,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817080655] [2021-06-05 14:07:23,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:23,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:23,737 INFO L87 Difference]: Start difference. First operand 131124 states and 396491 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:24,331 INFO L93 Difference]: Finished difference Result 131783 states and 397838 transitions. [2021-06-05 14:07:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:07:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:24,636 INFO L225 Difference]: With dead ends: 131783 [2021-06-05 14:07:24,636 INFO L226 Difference]: Without dead ends: 131778 [2021-06-05 14:07:24,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131778 states. [2021-06-05 14:07:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131778 to 131124. [2021-06-05 14:07:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023794452536931) internal successors, (396489), 131123 states have internal predecessors, (396489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396489 transitions. [2021-06-05 14:07:27,631 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396489 transitions. Word has length 24 [2021-06-05 14:07:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:27,631 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396489 transitions. [2021-06-05 14:07:27,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396489 transitions. [2021-06-05 14:07:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:27,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:27,682 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:27,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10023 [2021-06-05 14:07:27,883 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:27,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1020997096, now seen corresponding path program 314 times [2021-06-05 14:07:27,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:27,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303133735] [2021-06-05 14:07:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:28,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303133735] [2021-06-05 14:07:28,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303133735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855886199] [2021-06-05 14:07:28,465 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 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 [2021-06-05 14:07:28,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:07:28,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855886199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:28,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:28,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 14:07:28,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135868095] [2021-06-05 14:07:28,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:28,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:28,583 INFO L87 Difference]: Start difference. First operand 131124 states and 396489 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:29,176 INFO L93 Difference]: Finished difference Result 131712 states and 397702 transitions. [2021-06-05 14:07:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:07:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:07:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:29,443 INFO L225 Difference]: With dead ends: 131712 [2021-06-05 14:07:29,443 INFO L226 Difference]: Without dead ends: 131706 [2021-06-05 14:07:29,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131706 states. [2021-06-05 14:07:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131706 to 131124. [2021-06-05 14:07:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023779199682741) internal successors, (396487), 131123 states have internal predecessors, (396487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396487 transitions. [2021-06-05 14:07:32,228 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396487 transitions. Word has length 24 [2021-06-05 14:07:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:32,228 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396487 transitions. [2021-06-05 14:07:32,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396487 transitions. [2021-06-05 14:07:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:32,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:32,274 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:32,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10024 [2021-06-05 14:07:32,475 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:32,475 INFO L82 PathProgramCache]: Analyzing trace with hash -690466828, now seen corresponding path program 315 times [2021-06-05 14:07:32,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:32,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058430360] [2021-06-05 14:07:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:32,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:32,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058430360] [2021-06-05 14:07:32,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058430360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:32,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937143915] [2021-06-05 14:07:32,566 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 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 [2021-06-05 14:07:32,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:07:32,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:07:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:32,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937143915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:32,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:32,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:07:32,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988561209] [2021-06-05 14:07:32,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:32,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:32,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:32,647 INFO L87 Difference]: Start difference. First operand 131124 states and 396487 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:07:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:33,760 INFO L93 Difference]: Finished difference Result 131475 states and 397232 transitions. [2021-06-05 14:07:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 24 [2021-06-05 14:07:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:34,039 INFO L225 Difference]: With dead ends: 131475 [2021-06-05 14:07:34,039 INFO L226 Difference]: Without dead ends: 131470 [2021-06-05 14:07:34,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-06-05 14:07:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131115. [2021-06-05 14:07:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0236435468371035) internal successors, (396442), 131114 states have internal predecessors, (396442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 396442 transitions. [2021-06-05 14:07:36,976 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 396442 transitions. Word has length 24 [2021-06-05 14:07:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:36,976 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 396442 transitions. [2021-06-05 14:07:36,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:07:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 396442 transitions. [2021-06-05 14:07:37,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:37,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:37,030 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:37,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10025 [2021-06-05 14:07:37,231 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1053897178, now seen corresponding path program 316 times [2021-06-05 14:07:37,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:37,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923831102] [2021-06-05 14:07:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:37,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923831102] [2021-06-05 14:07:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923831102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822457368] [2021-06-05 14:07:37,323 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 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 [2021-06-05 14:07:37,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:37,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:37,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:07:37,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822457368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:37,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:37,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 14:07:37,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49532711] [2021-06-05 14:07:37,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:37,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:37,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:37,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:37,384 INFO L87 Difference]: Start difference. First operand 131115 states and 396442 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:38,567 INFO L93 Difference]: Finished difference Result 132301 states and 398883 transitions. [2021-06-05 14:07:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:07:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:38,834 INFO L225 Difference]: With dead ends: 132301 [2021-06-05 14:07:38,834 INFO L226 Difference]: Without dead ends: 132286 [2021-06-05 14:07:38,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132286 states. [2021-06-05 14:07:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132286 to 131160. [2021-06-05 14:07:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023116980153859) internal successors, (396509), 131159 states have internal predecessors, (396509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:41,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396509 transitions. [2021-06-05 14:07:41,522 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396509 transitions. Word has length 24 [2021-06-05 14:07:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:41,522 INFO L482 AbstractCegarLoop]: Abstraction has 131160 states and 396509 transitions. [2021-06-05 14:07:41,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396509 transitions. [2021-06-05 14:07:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:41,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:41,570 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:41,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10026,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:41,770 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash 629585942, now seen corresponding path program 317 times [2021-06-05 14:07:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:41,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214038641] [2021-06-05 14:07:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:41,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214038641] [2021-06-05 14:07:41,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214038641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195860270] [2021-06-05 14:07:41,865 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 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 [2021-06-05 14:07:41,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:07:41,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:07:41,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195860270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:41,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:41,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 14:07:41,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443201734] [2021-06-05 14:07:41,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:41,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:41,934 INFO L87 Difference]: Start difference. First operand 131160 states and 396509 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:43,149 INFO L93 Difference]: Finished difference Result 131749 states and 397717 transitions. [2021-06-05 14:07:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:07:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:07:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:43,432 INFO L225 Difference]: With dead ends: 131749 [2021-06-05 14:07:43,432 INFO L226 Difference]: Without dead ends: 131743 [2021-06-05 14:07:43,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131743 states. [2021-06-05 14:07:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131743 to 131160. [2021-06-05 14:07:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023109355820035) internal successors, (396508), 131159 states have internal predecessors, (396508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396508 transitions. [2021-06-05 14:07:46,054 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396508 transitions. Word has length 24 [2021-06-05 14:07:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:46,054 INFO L482 AbstractCegarLoop]: Abstraction has 131160 states and 396508 transitions. [2021-06-05 14:07:46,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:07:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396508 transitions. [2021-06-05 14:07:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:46,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:46,101 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:46,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10027 [2021-06-05 14:07:46,302 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash -89034798, now seen corresponding path program 318 times [2021-06-05 14:07:46,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:46,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680577490] [2021-06-05 14:07:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:07:46,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:46,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680577490] [2021-06-05 14:07:46,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680577490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132432567] [2021-06-05 14:07:46,361 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 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 [2021-06-05 14:07:46,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:07:46,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:46,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:07:46,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132432567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:46,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:46,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 14:07:46,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832387884] [2021-06-05 14:07:46,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:46,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:46,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:46,431 INFO L87 Difference]: Start difference. First operand 131160 states and 396508 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-06-05 14:07:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:46,941 INFO L93 Difference]: Finished difference Result 131436 states and 396919 transitions. [2021-06-05 14:07:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:07:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 24 [2021-06-05 14:07:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:47,794 INFO L225 Difference]: With dead ends: 131436 [2021-06-05 14:07:47,794 INFO L226 Difference]: Without dead ends: 131434 [2021-06-05 14:07:47,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131434 states. [2021-06-05 14:07:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131434 to 131152. [2021-06-05 14:07:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131152 states, 131151 states have (on average 3.0228438974922036) internal successors, (396449), 131151 states have internal predecessors, (396449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131152 states to 131152 states and 396449 transitions. [2021-06-05 14:07:50,586 INFO L78 Accepts]: Start accepts. Automaton has 131152 states and 396449 transitions. Word has length 24 [2021-06-05 14:07:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:50,586 INFO L482 AbstractCegarLoop]: Abstraction has 131152 states and 396449 transitions. [2021-06-05 14:07:50,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-06-05 14:07:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 131152 states and 396449 transitions. [2021-06-05 14:07:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:50,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:50,637 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:50,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10028 [2021-06-05 14:07:50,838 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash 561470900, now seen corresponding path program 319 times [2021-06-05 14:07:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:50,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127071258] [2021-06-05 14:07:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:50,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:50,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127071258] [2021-06-05 14:07:50,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127071258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:50,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118963723] [2021-06-05 14:07:50,913 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 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 [2021-06-05 14:07:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:07:50,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118963723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:50,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:50,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 14:07:50,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644993201] [2021-06-05 14:07:50,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:07:50,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:07:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:07:50,974 INFO L87 Difference]: Start difference. First operand 131152 states and 396449 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:07:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:51,609 INFO L93 Difference]: Finished difference Result 131396 states and 396804 transitions. [2021-06-05 14:07:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 24 [2021-06-05 14:07:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:51,941 INFO L225 Difference]: With dead ends: 131396 [2021-06-05 14:07:51,941 INFO L226 Difference]: Without dead ends: 131393 [2021-06-05 14:07:51,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131393 states. [2021-06-05 14:07:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131393 to 131141. [2021-06-05 14:07:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0221976513649533) internal successors, (396331), 131140 states have internal predecessors, (396331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396331 transitions. [2021-06-05 14:07:55,581 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396331 transitions. Word has length 24 [2021-06-05 14:07:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:55,581 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396331 transitions. [2021-06-05 14:07:55,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-06-05 14:07:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396331 transitions. [2021-06-05 14:07:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:07:55,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:55,633 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:55,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10029,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:55,834 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -511614480, now seen corresponding path program 320 times [2021-06-05 14:07:55,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:55,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696071681] [2021-06-05 14:07:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:55,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:55,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696071681] [2021-06-05 14:07:55,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696071681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:55,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578059673] [2021-06-05 14:07:55,914 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 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 [2021-06-05 14:07:55,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:55,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:55,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:07:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:07:56,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578059673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:56,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:56,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 14:07:56,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464168528] [2021-06-05 14:07:56,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:56,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:56,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:56,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:56,011 INFO L87 Difference]: Start difference. First operand 131141 states and 396331 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:07:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:56,637 INFO L93 Difference]: Finished difference Result 131390 states and 396692 transitions. [2021-06-05 14:07:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:07:56,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:07:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:56,947 INFO L225 Difference]: With dead ends: 131390 [2021-06-05 14:07:56,947 INFO L226 Difference]: Without dead ends: 131385 [2021-06-05 14:07:56,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:07:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131385 states. [2021-06-05 14:07:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131385 to 131141. [2021-06-05 14:07:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0206191856031723) internal successors, (396124), 131140 states have internal predecessors, (396124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396124 transitions. [2021-06-05 14:08:00,492 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396124 transitions. Word has length 24 [2021-06-05 14:08:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:00,492 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396124 transitions. [2021-06-05 14:08:00,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:08:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396124 transitions. [2021-06-05 14:08:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:08:00,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:00,594 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:00,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10030,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:00,795 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:00,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:00,795 INFO L82 PathProgramCache]: Analyzing trace with hash 582477108, now seen corresponding path program 321 times [2021-06-05 14:08:00,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:00,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847013960] [2021-06-05 14:08:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:00,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:00,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847013960] [2021-06-05 14:08:00,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847013960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717975337] [2021-06-05 14:08:00,879 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 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 [2021-06-05 14:08:00,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:00,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:08:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:00,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717975337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:00,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:08:00,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839987710] [2021-06-05 14:08:00,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:08:00,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:08:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:08:00,952 INFO L87 Difference]: Start difference. First operand 131141 states and 396124 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:01,591 INFO L93 Difference]: Finished difference Result 133913 states and 402552 transitions. [2021-06-05 14:08:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:08:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:08:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:01,912 INFO L225 Difference]: With dead ends: 133913 [2021-06-05 14:08:01,912 INFO L226 Difference]: Without dead ends: 133910 [2021-06-05 14:08:01,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133910 states. [2021-06-05 14:08:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133910 to 131141. [2021-06-05 14:08:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020283666310813) internal successors, (396080), 131140 states have internal predecessors, (396080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396080 transitions. [2021-06-05 14:08:05,358 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396080 transitions. Word has length 24 [2021-06-05 14:08:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:05,358 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396080 transitions. [2021-06-05 14:08:05,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396080 transitions. [2021-06-05 14:08:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:08:05,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:05,416 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:05,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10031,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:05,616 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash 139577968, now seen corresponding path program 322 times [2021-06-05 14:08:05,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:05,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383451629] [2021-06-05 14:08:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:05,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383451629] [2021-06-05 14:08:05,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383451629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626817396] [2021-06-05 14:08:05,703 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 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 [2021-06-05 14:08:06,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:08:06,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626817396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:06,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:06,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 14:08:06,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265077004] [2021-06-05 14:08:06,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:08:06,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:08:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:08:06,271 INFO L87 Difference]: Start difference. First operand 131141 states and 396080 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:08:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:06,926 INFO L93 Difference]: Finished difference Result 132975 states and 400018 transitions. [2021-06-05 14:08:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:08:06,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 24 [2021-06-05 14:08:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:07,263 INFO L225 Difference]: With dead ends: 132975 [2021-06-05 14:08:07,263 INFO L226 Difference]: Without dead ends: 132971 [2021-06-05 14:08:07,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-06-05 14:08:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131141. [2021-06-05 14:08:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020253164556962) internal successors, (396076), 131140 states have internal predecessors, (396076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396076 transitions. [2021-06-05 14:08:10,714 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396076 transitions. Word has length 24 [2021-06-05 14:08:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:10,714 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396076 transitions. [2021-06-05 14:08:10,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-06-05 14:08:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396076 transitions. [2021-06-05 14:08:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:08:10,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:10,773 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:10,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10032,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:10,974 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -705393484, now seen corresponding path program 323 times [2021-06-05 14:08:10,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:10,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333328826] [2021-06-05 14:08:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:11,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:11,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333328826] [2021-06-05 14:08:11,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333328826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:11,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590278208] [2021-06-05 14:08:11,068 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 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 [2021-06-05 14:08:11,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:11,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:08:11,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590278208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:11,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:11,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 14:08:11,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911464046] [2021-06-05 14:08:11,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:08:11,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:08:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:08:11,131 INFO L87 Difference]: Start difference. First operand 131141 states and 396076 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:08:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:12,380 INFO L93 Difference]: Finished difference Result 132986 states and 400023 transitions. [2021-06-05 14:08:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:08:12,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:08:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:12,675 INFO L225 Difference]: With dead ends: 132986 [2021-06-05 14:08:12,675 INFO L226 Difference]: Without dead ends: 132971 [2021-06-05 14:08:12,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-06-05 14:08:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131201. [2021-06-05 14:08:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197713414634144) internal successors, (396194), 131200 states have internal predecessors, (396194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396194 transitions. [2021-06-05 14:08:15,541 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396194 transitions. Word has length 24 [2021-06-05 14:08:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:15,542 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396194 transitions. [2021-06-05 14:08:15,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:08:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396194 transitions. [2021-06-05 14:08:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:08:15,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:15,600 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:15,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10033 [2021-06-05 14:08:15,800 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1129704720, now seen corresponding path program 324 times [2021-06-05 14:08:15,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:15,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055669401] [2021-06-05 14:08:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:15,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:15,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055669401] [2021-06-05 14:08:15,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055669401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:15,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550572155] [2021-06-05 14:08:15,898 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 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 [2021-06-05 14:08:15,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:15,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:08:15,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:15,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550572155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:15,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:15,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:08:15,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745864403] [2021-06-05 14:08:15,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:08:15,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:08:15,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:08:15,964 INFO L87 Difference]: Start difference. First operand 131201 states and 396194 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:08:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:17,229 INFO L93 Difference]: Finished difference Result 131929 states and 397683 transitions. [2021-06-05 14:08:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:08:17,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 24 [2021-06-05 14:08:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:17,548 INFO L225 Difference]: With dead ends: 131929 [2021-06-05 14:08:17,548 INFO L226 Difference]: Without dead ends: 131923 [2021-06-05 14:08:17,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131923 states. [2021-06-05 14:08:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131923 to 131201. [2021-06-05 14:08:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.019763719512195) internal successors, (396193), 131200 states have internal predecessors, (396193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396193 transitions. [2021-06-05 14:08:20,377 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396193 transitions. Word has length 24 [2021-06-05 14:08:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:20,377 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396193 transitions. [2021-06-05 14:08:20,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-06-05 14:08:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396193 transitions. [2021-06-05 14:08:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:08:20,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:20,435 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:20,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10034 [2021-06-05 14:08:20,636 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:20,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:20,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1398451148, now seen corresponding path program 325 times [2021-06-05 14:08:20,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:20,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188491998] [2021-06-05 14:08:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:20,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:20,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188491998] [2021-06-05 14:08:20,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188491998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:20,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117780196] [2021-06-05 14:08:20,740 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 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 [2021-06-05 14:08:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:08:20,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117780196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:20,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:20,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 14:08:20,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099355662] [2021-06-05 14:08:20,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:08:20,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:20,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:08:20,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:08:20,804 INFO L87 Difference]: Start difference. First operand 131201 states and 396193 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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) [2021-06-05 14:08:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:21,425 INFO L93 Difference]: Finished difference Result 131858 states and 397549 transitions. [2021-06-05 14:08:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:08:21,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 24 [2021-06-05 14:08:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:22,355 INFO L225 Difference]: With dead ends: 131858 [2021-06-05 14:08:22,355 INFO L226 Difference]: Without dead ends: 131851 [2021-06-05 14:08:22,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 Received shutdown request... [2021-06-05 14:08:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131851 states. [2021-06-05 14:08:22,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10035 [2021-06-05 14:08:22,639 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:08:22,641 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:08:22,642 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:08:22,643 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:08:22 BasicIcfg [2021-06-05 14:08:22,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:08:22,643 INFO L168 Benchmark]: Toolchain (without parser) took 771443.70 ms. Allocated memory was 331.4 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 311.0 MB in the beginning and 13.3 GB in the end (delta: -13.0 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 14:08:22,643 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 331.4 MB. Free memory was 312.1 MB in the beginning and 312.1 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:08:22,643 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 331.4 MB. Free memory was 310.9 MB in the beginning and 309.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:08:22,643 INFO L168 Benchmark]: Boogie Preprocessor took 13.91 ms. Allocated memory is still 331.4 MB. Free memory was 309.5 MB in the beginning and 308.6 MB in the end (delta: 921.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:08:22,643 INFO L168 Benchmark]: RCFGBuilder took 303.10 ms. Allocated memory is still 331.4 MB. Free memory was 308.5 MB in the beginning and 293.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 14:08:22,643 INFO L168 Benchmark]: TraceAbstraction took 771088.29 ms. Allocated memory was 331.4 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 293.1 MB in the beginning and 13.3 GB in the end (delta: -13.0 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 14:08:22,644 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 0.15 ms. Allocated memory is still 331.4 MB. Free memory was 312.1 MB in the beginning and 312.1 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 331.4 MB. Free memory was 310.9 MB in the beginning and 309.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.91 ms. Allocated memory is still 331.4 MB. Free memory was 309.5 MB in the beginning and 308.6 MB in the end (delta: 921.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 303.10 ms. Allocated memory is still 331.4 MB. Free memory was 308.5 MB in the beginning and 293.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 771088.29 ms. Allocated memory was 331.4 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 293.1 MB in the beginning and 13.3 GB in the end (delta: -13.0 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 770974.8ms, OverallIterations: 329, TraceHistogramMax: 12, EmptinessCheckTime: 5560.0ms, AutomataDifference: 151893.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5581 SDtfs, 25637 SDslu, 33196 SDs, 0 SdLazy, 44754 SolverSat, 8384 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20420.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13870 GetRequests, 6348 SyntacticMatches, 165 SemanticMatches, 7357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47292 ImplicationChecksByTransitivity, 50186.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131201occurred in iteration=327, InterpolantAutomatonStates: 6479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 302122.0ms AutomataMinimizationTime, 329 MinimizatonAttempts, 536421 StatesRemovedByMinimization, 323 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1059.7ms SsaConstructionTime, 3702.8ms SatisfiabilityAnalysisTime, 231892.8ms InterpolantComputationTime, 13349 NumberOfCodeBlocks, 13348 NumberOfCodeBlocksAsserted, 1475 NumberOfCheckSat, 12694 ConstructedInterpolants, 0 QuantifiedInterpolants, 56086 SizeOfPredicates, 166 NumberOfNonLiveVariables, 27101 ConjunctsInSsa, 4542 ConjunctsInUnsatCore, 655 InterpolantComputations, 3 PerfectInterpolantSequences, 11548/31930 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown