/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:47:57,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:47:57,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:47:57,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:47:57,110 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.epf [2021-06-05 21:47:57,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:47:57,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:47:57,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:47:57,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:47:57,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:47:57,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:47:57,125 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:47:57,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:47:57,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:47:57,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:47:57,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:47:57,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:47:57,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:47:57,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:47:57,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:47:57,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:47:57,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:47:57,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:47:57,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:47:57,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:47:57,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:47:57,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:47:57,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:47:57,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:47:57,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:47:57,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:47:57,358 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:47:57,359 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:47:57,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2021-06-05 21:47:57,359 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2021-06-05 21:47:57,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:47:57,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:47:57,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:47:57,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:47:57,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:47:57,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:47:57,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:47:57,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:47:57,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:47:57,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/1) ... [2021-06-05 21:47:57,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:47:57,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:47:57,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:47:57,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:47:57,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (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 21:47:57,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:47:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:47:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:47:57,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:47:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:47:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:47:57,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:47:57,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:47:57,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:47:57,513 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 21:47:57,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:47:57,818 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:47:57,819 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:47:57 BoogieIcfgContainer [2021-06-05 21:47:57,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:47:57,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:47:57,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:47:57,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:47:57,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:47:57" (1/2) ... [2021-06-05 21:47:57,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d41f2a and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:47:57, skipping insertion in model container [2021-06-05 21:47:57,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:47:57" (2/2) ... [2021-06-05 21:47:57,824 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2021-06-05 21:47:57,827 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:47:57,827 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:47:57,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:47:57,828 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:47:57,844 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:47:57,859 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:47:57,883 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:47:57,884 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:47:57,884 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:47:57,884 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:47:57,884 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:47:57,884 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:47:57,884 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:47:57,884 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:47:57,889 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-06-05 21:47:57,899 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:47:57,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:57,905 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:57,905 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash -715556201, now seen corresponding path program 1 times [2021-06-05 21:47:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:57,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724852722] [2021-06-05 21:47:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,044 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 21:47:58,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724852722] [2021-06-05 21:47:58,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724852722] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:47:58,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:47:58,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:47:58,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223969395] [2021-06-05 21:47:58,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:47:58,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:47:58,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:47:58,061 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:58,103 INFO L93 Difference]: Finished difference Result 31 states and 58 transitions. [2021-06-05 21:47:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:47:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:47:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:58,111 INFO L225 Difference]: With dead ends: 31 [2021-06-05 21:47:58,111 INFO L226 Difference]: Without dead ends: 31 [2021-06-05 21:47:58,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:47:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-06-05 21:47:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-06-05 21:47:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-06-05 21:47:58,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-06-05 21:47:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:58,141 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-06-05 21:47:58,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-06-05 21:47:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:47:58,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:58,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:58,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:47:58,142 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:58,146 INFO L82 PathProgramCache]: Analyzing trace with hash -434812415, now seen corresponding path program 2 times [2021-06-05 21:47:58,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:58,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413551400] [2021-06-05 21:47:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,190 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 21:47:58,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413551400] [2021-06-05 21:47:58,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413551400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:47:58,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:47:58,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:47:58,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806746593] [2021-06-05 21:47:58,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:47:58,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:47:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:47:58,196 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:58,224 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-06-05 21:47:58,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:47:58,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:47:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:58,225 INFO L225 Difference]: With dead ends: 35 [2021-06-05 21:47:58,225 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 21:47:58,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:47:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 21:47:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-06-05 21:47:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 66 transitions. [2021-06-05 21:47:58,235 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 66 transitions. Word has length 12 [2021-06-05 21:47:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:58,235 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 66 transitions. [2021-06-05 21:47:58,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 66 transitions. [2021-06-05 21:47:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:47:58,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:58,236 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:58,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:47:58,237 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash 114514857, now seen corresponding path program 1 times [2021-06-05 21:47:58,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:58,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806408125] [2021-06-05 21:47:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,315 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 21:47:58,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806408125] [2021-06-05 21:47:58,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806408125] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:47:58,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:47:58,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:47:58,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974232058] [2021-06-05 21:47:58,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:47:58,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:47:58,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:47:58,319 INFO L87 Difference]: Start difference. First operand 35 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:58,361 INFO L93 Difference]: Finished difference Result 56 states and 103 transitions. [2021-06-05 21:47:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:47:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:47:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:58,362 INFO L225 Difference]: With dead ends: 56 [2021-06-05 21:47:58,362 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 21:47:58,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:47:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 21:47:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-06-05 21:47:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-06-05 21:47:58,366 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-06-05 21:47:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:58,366 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-06-05 21:47:58,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-06-05 21:47:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:47:58,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:58,366 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:58,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:47:58,367 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1879146489, now seen corresponding path program 2 times [2021-06-05 21:47:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:58,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116273604] [2021-06-05 21:47:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,409 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 21:47:58,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116273604] [2021-06-05 21:47:58,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116273604] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:47:58,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:47:58,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:47:58,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050288715] [2021-06-05 21:47:58,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:47:58,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:47:58,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:47:58,411 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:58,459 INFO L93 Difference]: Finished difference Result 52 states and 97 transitions. [2021-06-05 21:47:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:47:58,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:47:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:58,463 INFO L225 Difference]: With dead ends: 52 [2021-06-05 21:47:58,463 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 21:47:58,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:47:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 21:47:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-06-05 21:47:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-06-05 21:47:58,475 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-06-05 21:47:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:58,475 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-06-05 21:47:58,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-06-05 21:47:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:47:58,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:58,476 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:58,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:47:58,476 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -544555159, now seen corresponding path program 3 times [2021-06-05 21:47:58,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:58,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151573722] [2021-06-05 21:47:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,540 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 21:47:58,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151573722] [2021-06-05 21:47:58,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151573722] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:47:58,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:47:58,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:47:58,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146664111] [2021-06-05 21:47:58,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:47:58,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:47:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:47:58,547 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:58,605 INFO L93 Difference]: Finished difference Result 41 states and 78 transitions. [2021-06-05 21:47:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:47:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:47:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:58,607 INFO L225 Difference]: With dead ends: 41 [2021-06-05 21:47:58,607 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 21:47:58,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:47:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 21:47:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-06-05 21:47:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-06-05 21:47:58,610 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-06-05 21:47:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:58,610 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-06-05 21:47:58,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-06-05 21:47:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:47:58,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:58,611 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:58,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:47:58,611 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash 434832868, now seen corresponding path program 1 times [2021-06-05 21:47:58,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:58,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277087410] [2021-06-05 21:47:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:47:58,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277087410] [2021-06-05 21:47:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277087410] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:47:58,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:47:58,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:47:58,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922748287] [2021-06-05 21:47:58,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:47:58,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:58,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:47:58,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:47:58,649 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:58,658 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-06-05 21:47:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:47:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:47:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:58,659 INFO L225 Difference]: With dead ends: 63 [2021-06-05 21:47:58,659 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 21:47:58,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:47:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 21:47:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-06-05 21:47:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2021-06-05 21:47:58,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 13 [2021-06-05 21:47:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:58,662 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2021-06-05 21:47:58,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2021-06-05 21:47:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:47:58,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:58,662 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:58,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:47:58,663 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash 373288736, now seen corresponding path program 2 times [2021-06-05 21:47:58,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:58,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711173916] [2021-06-05 21:47:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:47:58,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711173916] [2021-06-05 21:47:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711173916] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:47:58,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:47:58,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:47:58,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545366296] [2021-06-05 21:47:58,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:47:58,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:47:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:47:58,687 INFO L87 Difference]: Start difference. First operand 39 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:58,710 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-06-05 21:47:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:47:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:47:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:58,710 INFO L225 Difference]: With dead ends: 44 [2021-06-05 21:47:58,710 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 21:47:58,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:47:58,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 21:47:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 21:47:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 21:47:58,713 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 21:47:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:58,713 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 21:47:58,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 21:47:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:47:58,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:58,714 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:58,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 21:47:58,714 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:58,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:58,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1182521280, now seen corresponding path program 1 times [2021-06-05 21:47:58,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:58,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90766381] [2021-06-05 21:47:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:47:58,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:47:58,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90766381] [2021-06-05 21:47:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90766381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:47:58,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429868817] [2021-06-05 21:47:58,926 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 21:47:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:47:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:47:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:47:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:47:59,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429868817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:47:59,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:47:59,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:47:59,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263989336] [2021-06-05 21:47:59,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:47:59,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:47:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:47:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:47:59,265 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:59,684 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-06-05 21:47:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:47:59,708 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2021-06-05 21:47:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:47:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:47:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:47:59,709 INFO L225 Difference]: With dead ends: 71 [2021-06-05 21:47:59,709 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 21:47:59,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:47:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 21:47:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-06-05 21:47:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-05 21:47:59,712 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-06-05 21:47:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:47:59,712 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-05 21:47:59,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:47:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-05 21:47:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:47:59,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:47:59,713 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:47:59,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 21:47:59,929 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:47:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:47:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1118784670, now seen corresponding path program 2 times [2021-06-05 21:47:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:47:59,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113952116] [2021-06-05 21:47:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:47:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:00,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:00,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113952116] [2021-06-05 21:48:00,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113952116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:00,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962303694] [2021-06-05 21:48:00,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:00,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:00,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:48:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:00,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962303694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:00,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:00,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:48:00,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45159139] [2021-06-05 21:48:00,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:48:00,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:48:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:48:00,471 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:00,813 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-06-05 21:48:01,126 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 21:48:01,469 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 21:48:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:01,774 INFO L93 Difference]: Finished difference Result 101 states and 176 transitions. [2021-06-05 21:48:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:48:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:01,775 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:48:01,775 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 21:48:01,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1463.0ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:48:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 21:48:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-06-05 21:48:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-06-05 21:48:01,778 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 14 [2021-06-05 21:48:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:01,778 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-06-05 21:48:01,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-06-05 21:48:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:48:01,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:01,779 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:01,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 21:48:01,993 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash 531039348, now seen corresponding path program 3 times [2021-06-05 21:48:01,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:01,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93267165] [2021-06-05 21:48:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:02,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93267165] [2021-06-05 21:48:02,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93267165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308042391] [2021-06-05 21:48:02,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:02,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:48:02,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:02,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:48:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308042391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:02,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:02,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:48:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035809580] [2021-06-05 21:48:02,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:48:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:48:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:48:02,397 INFO L87 Difference]: Start difference. First operand 44 states and 86 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:02,742 INFO L93 Difference]: Finished difference Result 68 states and 131 transitions. [2021-06-05 21:48:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:48:02,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:02,743 INFO L225 Difference]: With dead ends: 68 [2021-06-05 21:48:02,743 INFO L226 Difference]: Without dead ends: 57 [2021-06-05 21:48:02,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:48:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-05 21:48:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-06-05 21:48:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 21:48:02,745 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-06-05 21:48:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:02,745 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 21:48:02,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 21:48:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:48:02,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:02,746 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:02,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 21:48:02,961 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:02,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1865630678, now seen corresponding path program 4 times [2021-06-05 21:48:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:02,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627671724] [2021-06-05 21:48:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627671724] [2021-06-05 21:48:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627671724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493815848] [2021-06-05 21:48:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:03,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:48:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:03,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493815848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:03,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:03,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:48:03,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125412995] [2021-06-05 21:48:03,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:48:03,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:48:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:03,347 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:03,780 INFO L93 Difference]: Finished difference Result 99 states and 177 transitions. [2021-06-05 21:48:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:03,780 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:48:03,781 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 21:48:03,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:48:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 21:48:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-06-05 21:48:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 96 transitions. [2021-06-05 21:48:03,783 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 96 transitions. Word has length 14 [2021-06-05 21:48:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:03,783 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 96 transitions. [2021-06-05 21:48:03,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 96 transitions. [2021-06-05 21:48:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:48:03,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:03,784 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:03,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:48:03,997 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1327775100, now seen corresponding path program 5 times [2021-06-05 21:48:03,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:03,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335466981] [2021-06-05 21:48:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:04,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:04,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335466981] [2021-06-05 21:48:04,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335466981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:04,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983046543] [2021-06-05 21:48:04,110 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 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 21:48:04,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:48:04,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:48:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:04,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983046543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:04,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:04,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:48:04,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110232875] [2021-06-05 21:48:04,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:48:04,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:48:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:04,289 INFO L87 Difference]: Start difference. First operand 48 states and 96 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:04,860 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-06-05 21:48:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:04,861 INFO L225 Difference]: With dead ends: 110 [2021-06-05 21:48:04,861 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:48:04,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 610.3ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:48:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:48:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-06-05 21:48:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2021-06-05 21:48:04,863 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 14 [2021-06-05 21:48:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:04,864 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2021-06-05 21:48:04,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2021-06-05 21:48:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:48:04,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:04,864 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:05,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 21:48:05,073 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1416837628, now seen corresponding path program 6 times [2021-06-05 21:48:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:05,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336024804] [2021-06-05 21:48:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:05,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:05,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336024804] [2021-06-05 21:48:05,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336024804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:05,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656574972] [2021-06-05 21:48:05,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:05,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:48:05,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:05,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:48:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656574972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:05,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:05,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:48:05,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257474503] [2021-06-05 21:48:05,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:48:05,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:48:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:48:05,488 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:05,825 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-06-05 21:48:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:48:05,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:05,826 INFO L225 Difference]: With dead ends: 97 [2021-06-05 21:48:05,826 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 21:48:05,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:48:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 21:48:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2021-06-05 21:48:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 115 transitions. [2021-06-05 21:48:05,828 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 115 transitions. Word has length 14 [2021-06-05 21:48:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:05,829 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 115 transitions. [2021-06-05 21:48:05,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 115 transitions. [2021-06-05 21:48:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:48:05,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:05,829 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:06,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:06,041 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:06,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1543538338, now seen corresponding path program 7 times [2021-06-05 21:48:06,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:06,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944487891] [2021-06-05 21:48:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:06,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944487891] [2021-06-05 21:48:06,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944487891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984729090] [2021-06-05 21:48:06,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:48:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:06,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984729090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:06,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:06,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:48:06,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26654486] [2021-06-05 21:48:06,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:48:06,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:06,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:48:06,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:06,370 INFO L87 Difference]: Start difference. First operand 56 states and 115 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:06,756 INFO L93 Difference]: Finished difference Result 115 states and 207 transitions. [2021-06-05 21:48:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:48:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:06,757 INFO L225 Difference]: With dead ends: 115 [2021-06-05 21:48:06,757 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 21:48:06,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 21:48:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-06-05 21:48:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-06-05 21:48:06,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 14 [2021-06-05 21:48:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:06,762 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-06-05 21:48:06,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-06-05 21:48:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:48:06,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:06,763 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:06,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:48:06,978 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2081393916, now seen corresponding path program 8 times [2021-06-05 21:48:06,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:06,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137100403] [2021-06-05 21:48:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:07,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137100403] [2021-06-05 21:48:07,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137100403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867100522] [2021-06-05 21:48:07,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:07,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:07,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:07,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:48:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:07,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867100522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:07,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:07,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:48:07,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713446907] [2021-06-05 21:48:07,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:48:07,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:48:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:07,327 INFO L87 Difference]: Start difference. First operand 57 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:07,654 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-06-05 21:48:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:07,655 INFO L225 Difference]: With dead ends: 115 [2021-06-05 21:48:07,655 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 21:48:07,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:48:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 21:48:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-06-05 21:48:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-06-05 21:48:07,657 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-06-05 21:48:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:07,658 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-06-05 21:48:07,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-06-05 21:48:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:48:07,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:07,658 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:07,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 21:48:07,873 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1119481792, now seen corresponding path program 9 times [2021-06-05 21:48:07,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:07,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994954390] [2021-06-05 21:48:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:07,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994954390] [2021-06-05 21:48:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994954390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872204058] [2021-06-05 21:48:07,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:07,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:48:07,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:07,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:48:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:08,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872204058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:08,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:08,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:48:08,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023400387] [2021-06-05 21:48:08,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:48:08,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:08,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:48:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:08,268 INFO L87 Difference]: Start difference. First operand 60 states and 125 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:09,082 INFO L93 Difference]: Finished difference Result 142 states and 277 transitions. [2021-06-05 21:48:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:48:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:48:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:09,083 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:48:09,083 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:48:09,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:48:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:48:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2021-06-05 21:48:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2021-06-05 21:48:09,085 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 14 [2021-06-05 21:48:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:09,085 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2021-06-05 21:48:09,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2021-06-05 21:48:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:09,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:09,086 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:09,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:09,301 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1559031433, now seen corresponding path program 10 times [2021-06-05 21:48:09,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:09,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51472794] [2021-06-05 21:48:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:09,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:09,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51472794] [2021-06-05 21:48:09,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51472794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:09,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624802561] [2021-06-05 21:48:09,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:09,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:09,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624802561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:09,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:09,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:48:09,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371952361] [2021-06-05 21:48:09,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:48:09,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:09,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:48:09,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:48:09,460 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:09,515 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2021-06-05 21:48:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:09,517 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:48:09,517 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:48:09,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:48:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-06-05 21:48:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-06-05 21:48:09,522 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-06-05 21:48:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:09,522 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-06-05 21:48:09,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-06-05 21:48:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:09,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:09,527 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:09,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:48:09,746 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:09,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1022375235, now seen corresponding path program 11 times [2021-06-05 21:48:09,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:09,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47122453] [2021-06-05 21:48:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:09,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:09,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47122453] [2021-06-05 21:48:09,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47122453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:09,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570512380] [2021-06-05 21:48:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:09,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:09,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:09,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:09,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:09,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570512380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:09,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:09,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:48:09,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904608304] [2021-06-05 21:48:09,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:48:09,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:09,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:48:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:48:09,917 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:10,169 INFO L93 Difference]: Finished difference Result 111 states and 225 transitions. [2021-06-05 21:48:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:48:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:10,170 INFO L225 Difference]: With dead ends: 111 [2021-06-05 21:48:10,170 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:48:10,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:48:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:48:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2021-06-05 21:48:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-06-05 21:48:10,172 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-06-05 21:48:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:10,172 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-06-05 21:48:10,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-06-05 21:48:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:10,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:10,172 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:10,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:10,385 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1144507010, now seen corresponding path program 12 times [2021-06-05 21:48:10,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:10,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261123434] [2021-06-05 21:48:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:10,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:10,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261123434] [2021-06-05 21:48:10,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261123434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:10,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968266296] [2021-06-05 21:48:10,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:10,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:48:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:10,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:10,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968266296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:10,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:10,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:48:10,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299837272] [2021-06-05 21:48:10,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:48:10,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:10,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:48:10,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:48:10,596 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:11,050 INFO L93 Difference]: Finished difference Result 131 states and 251 transitions. [2021-06-05 21:48:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:48:11,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:11,051 INFO L225 Difference]: With dead ends: 131 [2021-06-05 21:48:11,051 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:48:11,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:48:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:48:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-06-05 21:48:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-06-05 21:48:11,054 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-06-05 21:48:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:11,054 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-06-05 21:48:11,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-06-05 21:48:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:11,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:11,054 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:11,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:11,267 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash -225639483, now seen corresponding path program 13 times [2021-06-05 21:48:11,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:11,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727766367] [2021-06-05 21:48:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:11,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:11,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727766367] [2021-06-05 21:48:11,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727766367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:11,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034424553] [2021-06-05 21:48:11,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:11,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:11,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034424553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:11,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:11,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:11,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906783037] [2021-06-05 21:48:11,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:11,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:11,417 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:11,650 INFO L93 Difference]: Finished difference Result 141 states and 275 transitions. [2021-06-05 21:48:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:11,651 INFO L225 Difference]: With dead ends: 141 [2021-06-05 21:48:11,651 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 21:48:11,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 21:48:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2021-06-05 21:48:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-06-05 21:48:11,653 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-06-05 21:48:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:11,654 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-06-05 21:48:11,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-06-05 21:48:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:11,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:11,654 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:11,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 21:48:11,855 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash -432834720, now seen corresponding path program 14 times [2021-06-05 21:48:11,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:11,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703291126] [2021-06-05 21:48:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:11,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703291126] [2021-06-05 21:48:11,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703291126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205953709] [2021-06-05 21:48:11,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:11,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:11,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:11,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:12,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205953709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:12,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:12,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:12,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595245382] [2021-06-05 21:48:12,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:12,043 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:12,234 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-06-05 21:48:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:48:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:12,235 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:48:12,235 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:48:12,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:48:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:48:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-06-05 21:48:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1621621621621623) internal successors, (160), 74 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 160 transitions. [2021-06-05 21:48:12,237 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 160 transitions. Word has length 15 [2021-06-05 21:48:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:12,237 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 160 transitions. [2021-06-05 21:48:12,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 160 transitions. [2021-06-05 21:48:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:12,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:12,237 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:12,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:12,445 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash 250671963, now seen corresponding path program 15 times [2021-06-05 21:48:12,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:12,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953219820] [2021-06-05 21:48:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:12,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953219820] [2021-06-05 21:48:12,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953219820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37718059] [2021-06-05 21:48:12,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:12,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:48:12,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:12,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:12,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37718059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:12,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:12,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:12,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993633225] [2021-06-05 21:48:12,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:12,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:12,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:12,596 INFO L87 Difference]: Start difference. First operand 75 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:12,723 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-06-05 21:48:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:48:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:12,724 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:48:12,724 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 21:48:12,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:48:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 21:48:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-05 21:48:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 74 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 159 transitions. [2021-06-05 21:48:12,726 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 159 transitions. Word has length 15 [2021-06-05 21:48:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:12,726 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 159 transitions. [2021-06-05 21:48:12,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 159 transitions. [2021-06-05 21:48:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:12,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:12,727 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:12,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:12,941 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash 901756610, now seen corresponding path program 16 times [2021-06-05 21:48:12,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:12,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385852118] [2021-06-05 21:48:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:12,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:12,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385852118] [2021-06-05 21:48:12,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385852118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:12,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12383557] [2021-06-05 21:48:12,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:13,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:13,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:13,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12383557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:13,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:13,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:13,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159581304] [2021-06-05 21:48:13,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:13,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:13,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:13,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:13,137 INFO L87 Difference]: Start difference. First operand 75 states and 159 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:13,270 INFO L93 Difference]: Finished difference Result 100 states and 204 transitions. [2021-06-05 21:48:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:48:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:13,278 INFO L225 Difference]: With dead ends: 100 [2021-06-05 21:48:13,278 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:48:13,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:48:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2021-06-05 21:48:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-06-05 21:48:13,280 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-06-05 21:48:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:13,280 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-06-05 21:48:13,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-06-05 21:48:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:13,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:13,281 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:13,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:13,485 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2062611033, now seen corresponding path program 17 times [2021-06-05 21:48:13,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:13,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349488493] [2021-06-05 21:48:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:13,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:13,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349488493] [2021-06-05 21:48:13,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349488493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:13,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173730057] [2021-06-05 21:48:13,534 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 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 21:48:13,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:13,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:13,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173730057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:13,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:13,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:48:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085300614] [2021-06-05 21:48:13,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:48:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:48:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:48:13,639 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:13,729 INFO L93 Difference]: Finished difference Result 82 states and 172 transitions. [2021-06-05 21:48:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:13,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:13,730 INFO L225 Difference]: With dead ends: 82 [2021-06-05 21:48:13,730 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 21:48:13,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 21:48:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-06-05 21:48:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-06-05 21:48:13,732 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-06-05 21:48:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:13,732 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-06-05 21:48:13,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-06-05 21:48:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:13,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:13,732 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:13,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:13,937 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1265875281, now seen corresponding path program 18 times [2021-06-05 21:48:13,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:13,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430067222] [2021-06-05 21:48:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:13,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:13,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430067222] [2021-06-05 21:48:13,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430067222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:13,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787758456] [2021-06-05 21:48:13,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:14,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:48:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:14,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787758456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:14,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:14,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455102881] [2021-06-05 21:48:14,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:14,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:14,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:14,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:14,094 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:14,154 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-06-05 21:48:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:48:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:14,154 INFO L225 Difference]: With dead ends: 88 [2021-06-05 21:48:14,154 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 21:48:14,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 21:48:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-06-05 21:48:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-06-05 21:48:14,156 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-06-05 21:48:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:14,156 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-06-05 21:48:14,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-06-05 21:48:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:14,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:14,157 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:14,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:14,357 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:14,357 INFO L82 PathProgramCache]: Analyzing trace with hash -978325046, now seen corresponding path program 19 times [2021-06-05 21:48:14,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:14,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57702169] [2021-06-05 21:48:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:14,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:14,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57702169] [2021-06-05 21:48:14,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57702169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:14,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325457880] [2021-06-05 21:48:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:14,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325457880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:14,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:14,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:14,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338727590] [2021-06-05 21:48:14,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:14,548 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:14,588 INFO L93 Difference]: Finished difference Result 79 states and 164 transitions. [2021-06-05 21:48:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:14,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:14,589 INFO L225 Difference]: With dead ends: 79 [2021-06-05 21:48:14,589 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 21:48:14,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 21:48:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-05 21:48:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 144 transitions. [2021-06-05 21:48:14,591 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 144 transitions. Word has length 15 [2021-06-05 21:48:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:14,591 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 144 transitions. [2021-06-05 21:48:14,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 144 transitions. [2021-06-05 21:48:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:14,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:14,591 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:14,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:14,809 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:14,809 INFO L82 PathProgramCache]: Analyzing trace with hash 367867078, now seen corresponding path program 20 times [2021-06-05 21:48:14,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:14,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91213810] [2021-06-05 21:48:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:14,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:14,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91213810] [2021-06-05 21:48:14,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91213810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145660236] [2021-06-05 21:48:14,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:14,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:14,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:14,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:14,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145660236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:14,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:14,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:14,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918775216] [2021-06-05 21:48:14,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:14,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:14,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:14,962 INFO L87 Difference]: Start difference. First operand 69 states and 144 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:15,127 INFO L93 Difference]: Finished difference Result 124 states and 235 transitions. [2021-06-05 21:48:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:48:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:15,129 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:48:15,129 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 21:48:15,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:48:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 21:48:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2021-06-05 21:48:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-06-05 21:48:15,131 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-06-05 21:48:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:15,131 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-06-05 21:48:15,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-06-05 21:48:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:15,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:15,133 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:15,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 21:48:15,341 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:15,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953191, now seen corresponding path program 21 times [2021-06-05 21:48:15,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:15,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368662778] [2021-06-05 21:48:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:15,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368662778] [2021-06-05 21:48:15,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368662778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692267908] [2021-06-05 21:48:15,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:15,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:48:15,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:15,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692267908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:15,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:15,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:15,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849180227] [2021-06-05 21:48:15,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:15,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:15,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:15,543 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:15,643 INFO L93 Difference]: Finished difference Result 114 states and 220 transitions. [2021-06-05 21:48:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:48:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:15,644 INFO L225 Difference]: With dead ends: 114 [2021-06-05 21:48:15,644 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 21:48:15,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:48:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 21:48:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-06-05 21:48:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1728395061728394) internal successors, (176), 81 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2021-06-05 21:48:15,645 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 15 [2021-06-05 21:48:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:15,646 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2021-06-05 21:48:15,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2021-06-05 21:48:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:15,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:15,646 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:15,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 21:48:15,857 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash -169988500, now seen corresponding path program 22 times [2021-06-05 21:48:15,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:15,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518098734] [2021-06-05 21:48:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:15,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:15,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518098734] [2021-06-05 21:48:15,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518098734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:15,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051476014] [2021-06-05 21:48:15,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:15,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:15,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:15,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:15,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051476014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:15,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:15,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170958078] [2021-06-05 21:48:15,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:15,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:15,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:15,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:15,986 INFO L87 Difference]: Start difference. First operand 82 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:16,026 INFO L93 Difference]: Finished difference Result 96 states and 201 transitions. [2021-06-05 21:48:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:16,027 INFO L225 Difference]: With dead ends: 96 [2021-06-05 21:48:16,027 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:48:16,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:48:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-06-05 21:48:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.15) internal successors, (172), 80 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2021-06-05 21:48:16,029 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 15 [2021-06-05 21:48:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:16,029 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2021-06-05 21:48:16,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2021-06-05 21:48:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:16,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:16,029 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:16,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:16,245 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash 961923201, now seen corresponding path program 23 times [2021-06-05 21:48:16,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:16,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975847808] [2021-06-05 21:48:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:16,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:16,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975847808] [2021-06-05 21:48:16,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975847808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:16,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916067513] [2021-06-05 21:48:16,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:16,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:16,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:16,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:16,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916067513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:16,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:16,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:16,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135307162] [2021-06-05 21:48:16,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:16,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:16,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:16,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:16,386 INFO L87 Difference]: Start difference. First operand 81 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:16,421 INFO L93 Difference]: Finished difference Result 91 states and 190 transitions. [2021-06-05 21:48:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:16,422 INFO L225 Difference]: With dead ends: 91 [2021-06-05 21:48:16,422 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:48:16,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:48:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-06-05 21:48:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 21:48:16,430 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-05 21:48:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:16,430 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 21:48:16,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 21:48:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:16,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:16,430 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:16,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 21:48:16,647 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:16,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1551463716, now seen corresponding path program 24 times [2021-06-05 21:48:16,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:16,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346120188] [2021-06-05 21:48:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:16,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346120188] [2021-06-05 21:48:16,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346120188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148616443] [2021-06-05 21:48:16,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:16,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:48:16,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:16,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:16,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:16,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148616443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:16,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:16,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:16,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722811369] [2021-06-05 21:48:16,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:16,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:16,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:16,828 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:16,870 INFO L93 Difference]: Finished difference Result 84 states and 177 transitions. [2021-06-05 21:48:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:16,871 INFO L225 Difference]: With dead ends: 84 [2021-06-05 21:48:16,871 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:48:16,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:48:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2021-06-05 21:48:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 21:48:16,873 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-05 21:48:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:16,873 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 21:48:16,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 21:48:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:16,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:16,873 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:17,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:17,077 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash 930413889, now seen corresponding path program 25 times [2021-06-05 21:48:17,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:17,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852515615] [2021-06-05 21:48:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:17,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:17,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852515615] [2021-06-05 21:48:17,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852515615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:17,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806626010] [2021-06-05 21:48:17,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:17,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806626010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:17,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:17,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:17,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431214060] [2021-06-05 21:48:17,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:17,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:17,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:17,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:17,281 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:17,389 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 21:48:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:48:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:17,389 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:48:17,389 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 21:48:17,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 21:48:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-06-05 21:48:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 21:48:17,392 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-05 21:48:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:17,392 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 21:48:17,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 21:48:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:17,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:17,393 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:17,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 21:48:17,601 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:17,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:17,601 INFO L82 PathProgramCache]: Analyzing trace with hash -742071201, now seen corresponding path program 26 times [2021-06-05 21:48:17,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:17,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134065489] [2021-06-05 21:48:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:17,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134065489] [2021-06-05 21:48:17,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134065489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799150557] [2021-06-05 21:48:17,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:17,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:17,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799150557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:17,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:17,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:17,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341064629] [2021-06-05 21:48:17,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:17,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:17,803 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:17,878 INFO L93 Difference]: Finished difference Result 89 states and 182 transitions. [2021-06-05 21:48:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:48:17,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:17,879 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:48:17,879 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 21:48:17,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:48:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 21:48:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-06-05 21:48:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-05 21:48:17,881 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-05 21:48:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:17,881 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-05 21:48:17,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-05 21:48:17,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:17,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:17,881 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:18,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 21:48:18,097 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:18,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1373313029, now seen corresponding path program 27 times [2021-06-05 21:48:18,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:18,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046176749] [2021-06-05 21:48:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:18,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:18,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046176749] [2021-06-05 21:48:18,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046176749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:18,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135953019] [2021-06-05 21:48:18,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:18,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:48:18,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:18,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:18,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135953019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:18,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:18,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:18,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11049816] [2021-06-05 21:48:18,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:18,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:18,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:18,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:18,298 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:18,546 INFO L93 Difference]: Finished difference Result 122 states and 241 transitions. [2021-06-05 21:48:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:48:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:18,547 INFO L225 Difference]: With dead ends: 122 [2021-06-05 21:48:18,547 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 21:48:18,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:48:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 21:48:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2021-06-05 21:48:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-05 21:48:18,549 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-05 21:48:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:18,549 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-05 21:48:18,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-05 21:48:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:18,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:18,549 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:18,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:18,754 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1660863264, now seen corresponding path program 28 times [2021-06-05 21:48:18,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:18,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985814010] [2021-06-05 21:48:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:18,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:18,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985814010] [2021-06-05 21:48:18,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985814010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:18,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170565966] [2021-06-05 21:48:18,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:18,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:18,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:18,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:18,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:18,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170565966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:18,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:18,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:18,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466728429] [2021-06-05 21:48:18,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:18,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:18,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:18,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:18,892 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:19,106 INFO L93 Difference]: Finished difference Result 152 states and 289 transitions. [2021-06-05 21:48:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:19,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:19,107 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:48:19,107 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 21:48:19,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 21:48:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 80. [2021-06-05 21:48:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 21:48:19,109 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-05 21:48:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:19,109 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 21:48:19,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 21:48:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:19,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:19,109 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:19,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 21:48:19,325 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash -299172061, now seen corresponding path program 29 times [2021-06-05 21:48:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:19,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178297707] [2021-06-05 21:48:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:19,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:19,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178297707] [2021-06-05 21:48:19,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178297707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:19,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879631815] [2021-06-05 21:48:19,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:19,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:19,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:19,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879631815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:19,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:19,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:19,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957839006] [2021-06-05 21:48:19,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:19,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:19,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:19,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:19,531 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:19,796 INFO L93 Difference]: Finished difference Result 129 states and 251 transitions. [2021-06-05 21:48:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:48:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:19,797 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:48:19,797 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:48:19,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:48:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:48:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-06-05 21:48:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-05 21:48:19,799 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-05 21:48:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:19,799 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-05 21:48:19,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-05 21:48:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:19,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:19,799 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:20,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 21:48:20,009 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:20,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1962853544, now seen corresponding path program 30 times [2021-06-05 21:48:20,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:20,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971801307] [2021-06-05 21:48:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:20,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971801307] [2021-06-05 21:48:20,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971801307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836289521] [2021-06-05 21:48:20,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:20,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:48:20,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:20,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:20,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:20,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836289521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:20,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:20,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:20,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170922798] [2021-06-05 21:48:20,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:20,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:20,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:20,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:20,153 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:20,239 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-06-05 21:48:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:48:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:20,240 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:48:20,240 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:48:20,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:48:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-06-05 21:48:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-05 21:48:20,241 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-05 21:48:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:20,242 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-05 21:48:20,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-05 21:48:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:20,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:20,242 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:20,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:20,458 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash 207174205, now seen corresponding path program 31 times [2021-06-05 21:48:20,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:20,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035369461] [2021-06-05 21:48:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:20,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:20,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035369461] [2021-06-05 21:48:20,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035369461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:20,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57243936] [2021-06-05 21:48:20,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:20,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57243936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:20,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:20,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:48:20,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161508346] [2021-06-05 21:48:20,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:48:20,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:48:20,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:48:20,641 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:20,730 INFO L93 Difference]: Finished difference Result 107 states and 214 transitions. [2021-06-05 21:48:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:20,731 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:48:20,731 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:48:20,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:48:20,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:48:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-06-05 21:48:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.135135135135135) internal successors, (158), 74 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 158 transitions. [2021-06-05 21:48:20,732 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 158 transitions. Word has length 15 [2021-06-05 21:48:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:20,732 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 158 transitions. [2021-06-05 21:48:20,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 158 transitions. [2021-06-05 21:48:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:48:20,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:20,733 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:20,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 21:48:20,933 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:20,933 INFO L82 PathProgramCache]: Analyzing trace with hash 868761956, now seen corresponding path program 32 times [2021-06-05 21:48:20,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:20,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367502263] [2021-06-05 21:48:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:20,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:20,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367502263] [2021-06-05 21:48:20,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367502263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798803997] [2021-06-05 21:48:20,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:20,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:21,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798803997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:21,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:21,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:48:21,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056110931] [2021-06-05 21:48:21,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:48:21,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:21,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:48:21,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:48:21,044 INFO L87 Difference]: Start difference. First operand 75 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:21,092 INFO L93 Difference]: Finished difference Result 110 states and 222 transitions. [2021-06-05 21:48:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:21,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:48:21,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:21,093 INFO L225 Difference]: With dead ends: 110 [2021-06-05 21:48:21,093 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:48:21,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:48:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-06-05 21:48:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-05 21:48:21,094 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 15 [2021-06-05 21:48:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:21,094 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-05 21:48:21,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-05 21:48:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:21,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:21,095 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:21,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 21:48:21,311 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1907254775, now seen corresponding path program 33 times [2021-06-05 21:48:21,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:21,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487587789] [2021-06-05 21:48:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:21,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487587789] [2021-06-05 21:48:21,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487587789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276633861] [2021-06-05 21:48:21,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:21,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:48:21,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:21,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:21,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276633861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:21,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:21,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123061463] [2021-06-05 21:48:21,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:21,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:21,796 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:22,091 INFO L93 Difference]: Finished difference Result 138 states and 265 transitions. [2021-06-05 21:48:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:48:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:22,092 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:48:22,092 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:48:22,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:48:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:48:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-06-05 21:48:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 153 transitions. [2021-06-05 21:48:22,093 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 153 transitions. Word has length 16 [2021-06-05 21:48:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:22,093 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 153 transitions. [2021-06-05 21:48:22,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 153 transitions. [2021-06-05 21:48:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:22,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:22,094 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:22,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:22,309 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash 233295193, now seen corresponding path program 34 times [2021-06-05 21:48:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:22,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471954115] [2021-06-05 21:48:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:22,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:22,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471954115] [2021-06-05 21:48:22,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471954115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:22,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438905272] [2021-06-05 21:48:22,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:22,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:22,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:22,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438905272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:22,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:22,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:48:22,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915328999] [2021-06-05 21:48:22,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:48:22,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:22,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:48:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:48:22,765 INFO L87 Difference]: Start difference. First operand 74 states and 153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:23,362 INFO L93 Difference]: Finished difference Result 138 states and 266 transitions. [2021-06-05 21:48:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:23,362 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:48:23,362 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:48:23,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:48:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:48:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-06-05 21:48:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 21:48:23,364 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-06-05 21:48:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:23,364 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 21:48:23,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 21:48:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:23,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:23,365 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:23,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 21:48:23,585 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1344046537, now seen corresponding path program 35 times [2021-06-05 21:48:23,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:23,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754255897] [2021-06-05 21:48:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:23,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:23,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754255897] [2021-06-05 21:48:23,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754255897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:23,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133325737] [2021-06-05 21:48:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:23,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:24,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133325737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:24,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:24,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:24,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623010629] [2021-06-05 21:48:24,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:24,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:24,056 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:25,084 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2021-06-05 21:48:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:48:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:25,084 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:48:25,084 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:48:25,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1147.5ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:48:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:48:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2021-06-05 21:48:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 21:48:25,086 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-06-05 21:48:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:25,086 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 21:48:25,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 21:48:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:25,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:25,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:25,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:25,301 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -806940605, now seen corresponding path program 36 times [2021-06-05 21:48:25,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:25,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465066164] [2021-06-05 21:48:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:25,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465066164] [2021-06-05 21:48:25,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465066164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445628023] [2021-06-05 21:48:25,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:25,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:48:25,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:25,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:25,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:25,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445628023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:25,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:25,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:48:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236286232] [2021-06-05 21:48:25,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:48:25,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:48:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:48:25,816 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:26,270 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-06-05 21:48:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:48:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:26,271 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:48:26,271 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:48:26,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:48:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:48:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-06-05 21:48:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-06-05 21:48:26,273 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-06-05 21:48:26,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:26,273 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-06-05 21:48:26,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-06-05 21:48:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:26,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:26,273 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:26,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 21:48:26,489 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1910684961, now seen corresponding path program 37 times [2021-06-05 21:48:26,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:26,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618681864] [2021-06-05 21:48:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:26,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618681864] [2021-06-05 21:48:26,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618681864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997607578] [2021-06-05 21:48:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997607578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:26,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:26,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:26,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956181572] [2021-06-05 21:48:26,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:26,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:26,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:26,992 INFO L87 Difference]: Start difference. First operand 77 states and 159 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:27,586 INFO L93 Difference]: Finished difference Result 128 states and 249 transitions. [2021-06-05 21:48:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:48:27,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:27,587 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:48:27,587 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 21:48:27,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:48:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 21:48:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 78. [2021-06-05 21:48:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 21:48:27,589 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 21:48:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:27,589 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 21:48:27,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 21:48:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:27,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:27,589 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:27,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 21:48:27,797 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1049691005, now seen corresponding path program 38 times [2021-06-05 21:48:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115359809] [2021-06-05 21:48:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:27,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:27,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115359809] [2021-06-05 21:48:27,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115359809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:27,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902459164] [2021-06-05 21:48:27,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:28,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:28,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:28,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:28,162 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 21:48:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:28,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902459164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:28,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:28,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:28,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819470617] [2021-06-05 21:48:28,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:28,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:28,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:28,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:28,327 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:28,898 INFO L93 Difference]: Finished difference Result 141 states and 268 transitions. [2021-06-05 21:48:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:48:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:28,901 INFO L225 Difference]: With dead ends: 141 [2021-06-05 21:48:28,901 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:48:28,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:48:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:48:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2021-06-05 21:48:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-06-05 21:48:28,903 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-06-05 21:48:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:28,903 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-06-05 21:48:28,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-06-05 21:48:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:28,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:28,903 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:29,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:29,116 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1877936069, now seen corresponding path program 39 times [2021-06-05 21:48:29,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:29,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256034531] [2021-06-05 21:48:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:29,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:29,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256034531] [2021-06-05 21:48:29,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256034531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:29,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473535050] [2021-06-05 21:48:29,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:29,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:48:29,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:29,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:29,562 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 21:48:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:29,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473535050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:29,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:29,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:29,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179708381] [2021-06-05 21:48:29,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:29,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:29,684 INFO L87 Difference]: Start difference. First operand 79 states and 163 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:30,300 INFO L93 Difference]: Finished difference Result 145 states and 279 transitions. [2021-06-05 21:48:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:48:30,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:30,301 INFO L225 Difference]: With dead ends: 145 [2021-06-05 21:48:30,301 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:48:30,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 861.9ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:48:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:48:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2021-06-05 21:48:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2021-06-05 21:48:30,303 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 16 [2021-06-05 21:48:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:30,303 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2021-06-05 21:48:30,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2021-06-05 21:48:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:30,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:30,304 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:30,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 21:48:30,517 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash -543344739, now seen corresponding path program 40 times [2021-06-05 21:48:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:30,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220041880] [2021-06-05 21:48:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:30,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220041880] [2021-06-05 21:48:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220041880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397377312] [2021-06-05 21:48:30,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:30,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:30,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:30,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:31,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397377312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:31,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:31,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245182570] [2021-06-05 21:48:31,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:31,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:31,020 INFO L87 Difference]: Start difference. First operand 84 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:31,809 INFO L93 Difference]: Finished difference Result 173 states and 327 transitions. [2021-06-05 21:48:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:48:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:31,810 INFO L225 Difference]: With dead ends: 173 [2021-06-05 21:48:31,810 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:48:31,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 929.5ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:48:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:48:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2021-06-05 21:48:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 83 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 177 transitions. [2021-06-05 21:48:31,811 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 177 transitions. Word has length 16 [2021-06-05 21:48:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:31,812 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 177 transitions. [2021-06-05 21:48:31,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 177 transitions. [2021-06-05 21:48:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:31,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:31,812 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:32,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:32,021 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1081200317, now seen corresponding path program 41 times [2021-06-05 21:48:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:32,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251820307] [2021-06-05 21:48:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:32,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:32,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251820307] [2021-06-05 21:48:32,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251820307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:32,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397266436] [2021-06-05 21:48:32,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:32,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:48:32,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397266436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:32,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:32,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:32,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417679633] [2021-06-05 21:48:32,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:32,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:32,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:32,471 INFO L87 Difference]: Start difference. First operand 84 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:33,090 INFO L93 Difference]: Finished difference Result 179 states and 342 transitions. [2021-06-05 21:48:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:48:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:33,091 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:48:33,091 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:48:33,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:48:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:48:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 86. [2021-06-05 21:48:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:48:33,092 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 21:48:33,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:33,093 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:48:33,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:48:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:33,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:33,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:33,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 21:48:33,313 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1305488025, now seen corresponding path program 42 times [2021-06-05 21:48:33,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:33,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774368519] [2021-06-05 21:48:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:33,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:33,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774368519] [2021-06-05 21:48:33,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774368519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:33,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214951378] [2021-06-05 21:48:33,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:33,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:48:33,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:33,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214951378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:33,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:33,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:48:33,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208109134] [2021-06-05 21:48:33,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:48:33,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:48:33,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:48:33,801 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:34,148 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-06-05 21:48:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:48:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:34,149 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:48:34,149 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 21:48:34,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:48:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 21:48:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-06-05 21:48:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.13953488372093) internal successors, (184), 86 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 184 transitions. [2021-06-05 21:48:34,150 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 184 transitions. Word has length 16 [2021-06-05 21:48:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:34,150 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 184 transitions. [2021-06-05 21:48:34,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 184 transitions. [2021-06-05 21:48:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:34,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:34,151 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:34,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:34,351 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash -271853705, now seen corresponding path program 43 times [2021-06-05 21:48:34,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:34,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921152159] [2021-06-05 21:48:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:34,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:34,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921152159] [2021-06-05 21:48:34,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921152159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:34,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725572658] [2021-06-05 21:48:34,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725572658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:34,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:34,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:34,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600479736] [2021-06-05 21:48:34,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:34,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:34,819 INFO L87 Difference]: Start difference. First operand 87 states and 184 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:35,443 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-06-05 21:48:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:35,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:35,444 INFO L225 Difference]: With dead ends: 119 [2021-06-05 21:48:35,444 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 21:48:35,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 783.7ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:48:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 21:48:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2021-06-05 21:48:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-06-05 21:48:35,445 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-06-05 21:48:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:35,446 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-06-05 21:48:35,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-06-05 21:48:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:35,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:35,446 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:35,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:35,662 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1062737625, now seen corresponding path program 44 times [2021-06-05 21:48:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:35,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756078827] [2021-06-05 21:48:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:35,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:35,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756078827] [2021-06-05 21:48:35,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756078827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:35,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636315059] [2021-06-05 21:48:35,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:35,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:35,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:36,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636315059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:36,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:36,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:36,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890157747] [2021-06-05 21:48:36,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:36,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:36,157 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:36,684 INFO L93 Difference]: Finished difference Result 144 states and 276 transitions. [2021-06-05 21:48:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:48:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:36,685 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:48:36,685 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 21:48:36,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:48:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 21:48:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2021-06-05 21:48:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-06-05 21:48:36,687 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-06-05 21:48:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:36,687 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-06-05 21:48:36,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-06-05 21:48:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:36,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:36,687 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:36,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:36,889 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash 234492561, now seen corresponding path program 45 times [2021-06-05 21:48:36,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:36,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937650370] [2021-06-05 21:48:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:37,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937650370] [2021-06-05 21:48:37,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937650370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895334166] [2021-06-05 21:48:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:37,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:48:37,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:37,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895334166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:37,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:37,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175192388] [2021-06-05 21:48:37,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:37,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:37,401 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:38,123 INFO L93 Difference]: Finished difference Result 141 states and 272 transitions. [2021-06-05 21:48:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:48:38,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:38,123 INFO L225 Difference]: With dead ends: 141 [2021-06-05 21:48:38,123 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:48:38,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 957.9ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:48:38,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:48:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2021-06-05 21:48:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1666666666666665) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 195 transitions. [2021-06-05 21:48:38,125 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 195 transitions. Word has length 16 [2021-06-05 21:48:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:38,125 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 195 transitions. [2021-06-05 21:48:38,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 195 transitions. [2021-06-05 21:48:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:38,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:38,132 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:38,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:38,349 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:38,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1031228313, now seen corresponding path program 46 times [2021-06-05 21:48:38,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:38,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989376213] [2021-06-05 21:48:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:38,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:38,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989376213] [2021-06-05 21:48:38,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989376213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:38,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262823651] [2021-06-05 21:48:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:38,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:38,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:38,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:38,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262823651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:38,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:38,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889982806] [2021-06-05 21:48:38,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:38,788 INFO L87 Difference]: Start difference. First operand 91 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:39,203 INFO L93 Difference]: Finished difference Result 150 states and 295 transitions. [2021-06-05 21:48:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:48:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:39,203 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:48:39,203 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 21:48:39,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:48:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 21:48:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-06-05 21:48:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:48:39,205 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-06-05 21:48:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:39,205 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:48:39,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:48:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:39,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:39,206 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:39,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-05 21:48:39,409 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1248642377, now seen corresponding path program 47 times [2021-06-05 21:48:39,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:39,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327751440] [2021-06-05 21:48:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:39,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:39,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327751440] [2021-06-05 21:48:39,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327751440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:39,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750535984] [2021-06-05 21:48:39,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:39,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:48:39,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:39,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:39,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:39,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750535984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:39,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:39,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:39,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254454167] [2021-06-05 21:48:39,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:39,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:39,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:39,944 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:40,497 INFO L93 Difference]: Finished difference Result 176 states and 339 transitions. [2021-06-05 21:48:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:48:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:40,498 INFO L225 Difference]: With dead ends: 176 [2021-06-05 21:48:40,498 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 21:48:40,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:48:40,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 21:48:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2021-06-05 21:48:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-05 21:48:40,500 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-06-05 21:48:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:40,500 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-05 21:48:40,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-05 21:48:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:40,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:40,501 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:40,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:40,701 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash -565135694, now seen corresponding path program 48 times [2021-06-05 21:48:40,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:40,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376309806] [2021-06-05 21:48:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:48:40,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376309806] [2021-06-05 21:48:40,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376309806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948710639] [2021-06-05 21:48:40,742 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 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 21:48:40,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:48:40,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:40,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:48:40,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948710639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:40,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:40,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:40,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35344606] [2021-06-05 21:48:40,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:40,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:40,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:40,902 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:40,931 INFO L93 Difference]: Finished difference Result 99 states and 210 transitions. [2021-06-05 21:48:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:40,931 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:48:40,932 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 21:48:40,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 21:48:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-06-05 21:48:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.176470588235294) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-06-05 21:48:40,933 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 16 [2021-06-05 21:48:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:40,933 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-06-05 21:48:40,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-06-05 21:48:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:40,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:40,933 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:41,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:41,134 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:41,134 INFO L82 PathProgramCache]: Analyzing trace with hash 85948953, now seen corresponding path program 49 times [2021-06-05 21:48:41,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:41,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228447657] [2021-06-05 21:48:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:41,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228447657] [2021-06-05 21:48:41,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228447657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808643860] [2021-06-05 21:48:41,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:41,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:41,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:41,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808643860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:41,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:41,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:41,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202282887] [2021-06-05 21:48:41,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:41,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:41,580 INFO L87 Difference]: Start difference. First operand 86 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:42,129 INFO L93 Difference]: Finished difference Result 159 states and 305 transitions. [2021-06-05 21:48:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:48:42,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:42,130 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:48:42,130 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 21:48:42,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 718.5ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:48:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 21:48:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 89. [2021-06-05 21:48:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-06-05 21:48:42,132 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-06-05 21:48:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:42,132 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-06-05 21:48:42,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-06-05 21:48:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:42,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:42,132 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:42,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:42,348 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash -451906625, now seen corresponding path program 50 times [2021-06-05 21:48:42,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:42,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686159415] [2021-06-05 21:48:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:42,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:42,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686159415] [2021-06-05 21:48:42,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686159415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:42,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405190820] [2021-06-05 21:48:42,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:48:42,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:42,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:42,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405190820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:42,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:42,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:42,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572293816] [2021-06-05 21:48:42,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:42,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:42,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:42,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:42,796 INFO L87 Difference]: Start difference. First operand 89 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:43,457 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-06-05 21:48:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:48:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:43,458 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:48:43,458 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:48:43,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 832.7ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:48:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:48:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2021-06-05 21:48:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-06-05 21:48:43,459 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-06-05 21:48:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:43,459 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-06-05 21:48:43,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-06-05 21:48:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:43,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:43,460 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:43,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:43,665 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 54439641, now seen corresponding path program 51 times [2021-06-05 21:48:43,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:43,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916604931] [2021-06-05 21:48:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:43,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:43,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916604931] [2021-06-05 21:48:43,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916604931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:43,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941665255] [2021-06-05 21:48:43,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:43,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:48:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:44,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941665255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:44,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:44,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:44,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727975167] [2021-06-05 21:48:44,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:44,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:44,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:44,120 INFO L87 Difference]: Start difference. First operand 89 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:44,439 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-05 21:48:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:44,917 INFO L93 Difference]: Finished difference Result 184 states and 344 transitions. [2021-06-05 21:48:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:48:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:44,918 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:48:44,918 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 21:48:44,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:48:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 21:48:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2021-06-05 21:48:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-05 21:48:44,919 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 16 [2021-06-05 21:48:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:44,919 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-05 21:48:44,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-05 21:48:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:44,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:44,920 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:45,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 21:48:45,125 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2140856799, now seen corresponding path program 52 times [2021-06-05 21:48:45,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:45,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077716422] [2021-06-05 21:48:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:45,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:45,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077716422] [2021-06-05 21:48:45,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077716422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:45,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060704110] [2021-06-05 21:48:45,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:45,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:45,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:45,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:45,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060704110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:45,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:45,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:48:45,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683507354] [2021-06-05 21:48:45,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:48:45,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:48:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:48:45,594 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:45,952 INFO L93 Difference]: Finished difference Result 107 states and 224 transitions. [2021-06-05 21:48:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:48:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:45,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:45,952 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:48:45,952 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:48:45,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:48:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:48:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-06-05 21:48:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 21:48:45,954 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-06-05 21:48:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:45,954 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 21:48:45,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 21:48:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:45,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:45,954 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:46,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 21:48:46,155 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:46,155 INFO L82 PathProgramCache]: Analyzing trace with hash 576768767, now seen corresponding path program 53 times [2021-06-05 21:48:46,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:46,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809900211] [2021-06-05 21:48:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:46,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809900211] [2021-06-05 21:48:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809900211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239239483] [2021-06-05 21:48:46,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:46,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:46,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239239483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:46,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:46,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:46,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626847521] [2021-06-05 21:48:46,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:46,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:46,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:46,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:46,539 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:47,183 INFO L93 Difference]: Finished difference Result 138 states and 276 transitions. [2021-06-05 21:48:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:48:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:47,184 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:48:47,184 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:48:47,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 744.0ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:48:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:48:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 95. [2021-06-05 21:48:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 94 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2021-06-05 21:48:47,185 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 16 [2021-06-05 21:48:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:47,185 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 208 transitions. [2021-06-05 21:48:47,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 208 transitions. [2021-06-05 21:48:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:47,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:47,186 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:47,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 21:48:47,386 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1911360097, now seen corresponding path program 54 times [2021-06-05 21:48:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:47,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259484892] [2021-06-05 21:48:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:47,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259484892] [2021-06-05 21:48:47,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259484892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081437154] [2021-06-05 21:48:47,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:47,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:48:47,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:47,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:47,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081437154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:47,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:47,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628252687] [2021-06-05 21:48:47,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:47,847 INFO L87 Difference]: Start difference. First operand 95 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:48,302 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-06-05 21:48:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:48:48,302 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:48,303 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:48:48,303 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:48:48,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:48:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:48:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-06-05 21:48:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 21:48:48,304 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-06-05 21:48:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:48,304 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 21:48:48,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 21:48:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:48,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:48,305 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:48,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 21:48:48,505 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1290310270, now seen corresponding path program 55 times [2021-06-05 21:48:48,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:48,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665809308] [2021-06-05 21:48:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:48:48,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:48,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665809308] [2021-06-05 21:48:48,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665809308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:48,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791169594] [2021-06-05 21:48:48,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:48,638 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 21:48:48,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791169594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:48,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:48,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646012032] [2021-06-05 21:48:48,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:48,639 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:48,703 INFO L93 Difference]: Finished difference Result 112 states and 241 transitions. [2021-06-05 21:48:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:48:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:48,705 INFO L225 Difference]: With dead ends: 112 [2021-06-05 21:48:48,705 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 21:48:48,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:48:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 21:48:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2021-06-05 21:48:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-05 21:48:48,707 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 16 [2021-06-05 21:48:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:48,707 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-05 21:48:48,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-05 21:48:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:48,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:48,707 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:48,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:48,913 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1083115033, now seen corresponding path program 56 times [2021-06-05 21:48:48,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:48,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123351491] [2021-06-05 21:48:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:49,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123351491] [2021-06-05 21:48:49,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123351491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006414563] [2021-06-05 21:48:49,053 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 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 21:48:49,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:49,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:49,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006414563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:49,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:49,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694507012] [2021-06-05 21:48:49,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:49,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:49,372 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:49,919 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-06-05 21:48:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:48:49,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:49,920 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:48:49,920 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 21:48:49,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:48:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 21:48:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2021-06-05 21:48:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 214 transitions. [2021-06-05 21:48:49,922 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 214 transitions. Word has length 16 [2021-06-05 21:48:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:49,922 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 214 transitions. [2021-06-05 21:48:49,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 214 transitions. [2021-06-05 21:48:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:49,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:49,922 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:50,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:50,131 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:50,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1877260933, now seen corresponding path program 57 times [2021-06-05 21:48:50,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:50,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270730544] [2021-06-05 21:48:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:50,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:50,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270730544] [2021-06-05 21:48:50,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270730544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:50,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027078892] [2021-06-05 21:48:50,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:50,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:48:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:50,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:50,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:50,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027078892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:50,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:50,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:50,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234791523] [2021-06-05 21:48:50,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:50,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:50,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:50,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:50,582 INFO L87 Difference]: Start difference. First operand 98 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:51,005 INFO L93 Difference]: Finished difference Result 148 states and 293 transitions. [2021-06-05 21:48:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:48:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:51,006 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:48:51,006 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:48:51,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 615.6ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:48:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:48:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-06-05 21:48:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-05 21:48:51,007 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-06-05 21:48:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:51,008 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-05 21:48:51,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-05 21:48:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:51,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:51,008 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:51,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:51,214 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:51,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:51,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1879850785, now seen corresponding path program 58 times [2021-06-05 21:48:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:51,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937147375] [2021-06-05 21:48:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:51,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:51,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937147375] [2021-06-05 21:48:51,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937147375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:51,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349166701] [2021-06-05 21:48:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:51,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:51,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:51,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:51,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349166701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:51,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:51,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:51,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782379786] [2021-06-05 21:48:51,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:51,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:51,634 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:52,241 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-06-05 21:48:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:48:52,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:52,242 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:48:52,242 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:48:52,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:48:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:48:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2021-06-05 21:48:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2323232323232323) internal successors, (221), 99 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-06-05 21:48:52,244 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 16 [2021-06-05 21:48:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:52,244 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-06-05 21:48:52,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-06-05 21:48:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:52,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:52,244 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:52,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 21:48:52,460 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash -400019905, now seen corresponding path program 59 times [2021-06-05 21:48:52,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:52,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660397714] [2021-06-05 21:48:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:52,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:52,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660397714] [2021-06-05 21:48:52,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660397714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:52,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323634125] [2021-06-05 21:48:52,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:52,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:48:52,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:52,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:52,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:52,834 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 21:48:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:52,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323634125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:52,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:52,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:52,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868936664] [2021-06-05 21:48:52,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:52,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:52,944 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:53,311 INFO L93 Difference]: Finished difference Result 131 states and 273 transitions. [2021-06-05 21:48:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:48:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:53,312 INFO L225 Difference]: With dead ends: 131 [2021-06-05 21:48:53,312 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:48:53,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:48:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:48:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-06-05 21:48:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.227722772277228) internal successors, (225), 101 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 225 transitions. [2021-06-05 21:48:53,314 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 225 transitions. Word has length 16 [2021-06-05 21:48:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:53,314 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 225 transitions. [2021-06-05 21:48:53,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 225 transitions. [2021-06-05 21:48:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:53,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:53,314 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:53,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:53,515 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash 934571425, now seen corresponding path program 60 times [2021-06-05 21:48:53,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:53,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367124676] [2021-06-05 21:48:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:53,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:53,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367124676] [2021-06-05 21:48:53,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367124676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:53,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213421469] [2021-06-05 21:48:53,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:53,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:48:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:53,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213421469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:53,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:53,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:53,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634177774] [2021-06-05 21:48:53,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:53,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:53,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:53,888 INFO L87 Difference]: Start difference. First operand 102 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:54,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:54,542 INFO L93 Difference]: Finished difference Result 178 states and 347 transitions. [2021-06-05 21:48:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:48:54,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:54,543 INFO L225 Difference]: With dead ends: 178 [2021-06-05 21:48:54,543 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:48:54,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:48:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:48:54,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-06-05 21:48:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 103 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 231 transitions. [2021-06-05 21:48:54,545 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 231 transitions. Word has length 16 [2021-06-05 21:48:54,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:54,545 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 231 transitions. [2021-06-05 21:48:54,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 231 transitions. [2021-06-05 21:48:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:54,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:54,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:54,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 21:48:54,755 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:54,755 INFO L82 PathProgramCache]: Analyzing trace with hash 396715847, now seen corresponding path program 61 times [2021-06-05 21:48:54,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:54,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834707547] [2021-06-05 21:48:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:54,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:54,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834707547] [2021-06-05 21:48:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834707547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:54,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931426256] [2021-06-05 21:48:54,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:48:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:55,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931426256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:55,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:55,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:55,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89389650] [2021-06-05 21:48:55,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:55,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:55,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:55,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:55,219 INFO L87 Difference]: Start difference. First operand 104 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:55,792 INFO L93 Difference]: Finished difference Result 161 states and 329 transitions. [2021-06-05 21:48:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:48:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:55,793 INFO L225 Difference]: With dead ends: 161 [2021-06-05 21:48:55,793 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 21:48:55,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 756.8ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:48:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 21:48:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-06-05 21:48:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.2641509433962264) internal successors, (240), 106 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 240 transitions. [2021-06-05 21:48:55,801 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 240 transitions. Word has length 16 [2021-06-05 21:48:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:55,801 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 240 transitions. [2021-06-05 21:48:55,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 240 transitions. [2021-06-05 21:48:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:55,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:55,802 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:56,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:56,002 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash 189520610, now seen corresponding path program 62 times [2021-06-05 21:48:56,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:56,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846456989] [2021-06-05 21:48:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:48:56,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846456989] [2021-06-05 21:48:56,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846456989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805616885] [2021-06-05 21:48:56,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:56,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:48:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:48:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805616885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:56,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:56,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:56,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125389654] [2021-06-05 21:48:56,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:56,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:56,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:56,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:56,136 INFO L87 Difference]: Start difference. First operand 107 states and 240 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:56,256 INFO L93 Difference]: Finished difference Result 163 states and 332 transitions. [2021-06-05 21:48:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:48:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:56,257 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:48:56,257 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 21:48:56,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:48:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 21:48:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2021-06-05 21:48:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.293577981651376) internal successors, (250), 109 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 250 transitions. [2021-06-05 21:48:56,262 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 250 transitions. Word has length 16 [2021-06-05 21:48:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:56,262 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 250 transitions. [2021-06-05 21:48:56,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 250 transitions. [2021-06-05 21:48:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:56,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:56,262 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:56,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 21:48:56,473 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash 903062113, now seen corresponding path program 63 times [2021-06-05 21:48:56,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:56,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657990332] [2021-06-05 21:48:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:56,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:56,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657990332] [2021-06-05 21:48:56,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657990332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:56,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116091608] [2021-06-05 21:48:56,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:56,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:48:56,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:56,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116091608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:56,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:56,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:56,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111650977] [2021-06-05 21:48:56,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:56,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:56,893 INFO L87 Difference]: Start difference. First operand 110 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:58,347 INFO L93 Difference]: Finished difference Result 219 states and 429 transitions. [2021-06-05 21:48:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:48:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:58,348 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:48:58,348 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:48:58,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1562.0ms TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:48:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:48:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2021-06-05 21:48:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.280701754385965) internal successors, (260), 114 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 260 transitions. [2021-06-05 21:48:58,350 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 260 transitions. Word has length 16 [2021-06-05 21:48:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:58,350 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 260 transitions. [2021-06-05 21:48:58,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 260 transitions. [2021-06-05 21:48:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:58,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:58,350 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:58,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 21:48:58,551 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:58,551 INFO L82 PathProgramCache]: Analyzing trace with hash 695866876, now seen corresponding path program 64 times [2021-06-05 21:48:58,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:58,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507785677] [2021-06-05 21:48:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:48:58,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:58,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507785677] [2021-06-05 21:48:58,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507785677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:58,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416895774] [2021-06-05 21:48:58,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:58,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:48:58,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:48:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:48:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416895774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:58,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:58,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:48:58,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486028457] [2021-06-05 21:48:58,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:48:58,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:58,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:48:58,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:58,680 INFO L87 Difference]: Start difference. First operand 115 states and 260 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:58,720 INFO L93 Difference]: Finished difference Result 127 states and 279 transitions. [2021-06-05 21:48:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:48:58,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:58,720 INFO L225 Difference]: With dead ends: 127 [2021-06-05 21:48:58,720 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:48:58,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:48:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:48:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-06-05 21:48:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 252 transitions. [2021-06-05 21:48:58,722 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 252 transitions. Word has length 16 [2021-06-05 21:48:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:58,722 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 252 transitions. [2021-06-05 21:48:58,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 252 transitions. [2021-06-05 21:48:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:58,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:58,722 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:58,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 21:48:58,931 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:58,932 INFO L82 PathProgramCache]: Analyzing trace with hash 444951547, now seen corresponding path program 65 times [2021-06-05 21:48:58,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:58,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287384130] [2021-06-05 21:48:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:48:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:59,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:48:59,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287384130] [2021-06-05 21:48:59,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287384130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:59,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275371167] [2021-06-05 21:48:59,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:48:59,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:48:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:48:59,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:48:59,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:48:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:48:59,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275371167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:48:59,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:48:59,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:48:59,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73233432] [2021-06-05 21:48:59,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:48:59,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:48:59,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:48:59,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:48:59,464 INFO L87 Difference]: Start difference. First operand 113 states and 252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:48:59,763 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-06-05 21:48:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:48:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:48:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:48:59,764 INFO L225 Difference]: With dead ends: 149 [2021-06-05 21:48:59,764 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:48:59,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:48:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:48:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-06-05 21:48:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.245614035087719) internal successors, (256), 114 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 256 transitions. [2021-06-05 21:48:59,766 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 256 transitions. Word has length 16 [2021-06-05 21:48:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:48:59,766 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 256 transitions. [2021-06-05 21:48:59,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:48:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 256 transitions. [2021-06-05 21:48:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:48:59,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:48:59,766 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:48:59,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 21:48:59,979 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:48:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:48:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542877, now seen corresponding path program 66 times [2021-06-05 21:48:59,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:48:59,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557117305] [2021-06-05 21:48:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:48:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:00,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557117305] [2021-06-05 21:49:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557117305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464235942] [2021-06-05 21:49:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:00,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:49:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:00,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464235942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:00,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:00,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:49:00,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483592637] [2021-06-05 21:49:00,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:49:00,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:00,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:49:00,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:00,446 INFO L87 Difference]: Start difference. First operand 115 states and 256 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:00,829 INFO L93 Difference]: Finished difference Result 160 states and 331 transitions. [2021-06-05 21:49:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:49:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:49:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:00,830 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:49:00,830 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 21:49:00,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:49:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 21:49:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2021-06-05 21:49:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-06-05 21:49:00,831 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-06-05 21:49:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:00,831 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-06-05 21:49:00,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-06-05 21:49:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:49:00,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:00,832 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:01,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 21:49:01,045 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:01,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1241687299, now seen corresponding path program 67 times [2021-06-05 21:49:01,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:01,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258494148] [2021-06-05 21:49:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:01,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258494148] [2021-06-05 21:49:01,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258494148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897504926] [2021-06-05 21:49:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:01,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:49:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:01,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897504926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:01,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:01,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:49:01,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396823525] [2021-06-05 21:49:01,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:49:01,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:49:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:01,494 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:02,085 INFO L93 Difference]: Finished difference Result 167 states and 349 transitions. [2021-06-05 21:49:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:49:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:49:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:02,086 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:49:02,086 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:49:02,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:49:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:49:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114. [2021-06-05 21:49:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-06-05 21:49:02,087 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-06-05 21:49:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:02,087 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-06-05 21:49:02,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-06-05 21:49:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:49:02,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:02,088 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:02,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:02,305 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1748033565, now seen corresponding path program 68 times [2021-06-05 21:49:02,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:02,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021751970] [2021-06-05 21:49:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:02,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:02,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021751970] [2021-06-05 21:49:02,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021751970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:02,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725892142] [2021-06-05 21:49:02,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:02,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:02,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:49:02,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:02,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725892142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:02,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:02,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:49:02,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712757080] [2021-06-05 21:49:02,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:49:02,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:02,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:49:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:02,734 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:03,392 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-06-05 21:49:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:03,464 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-06-05 21:49:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:49:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:49:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:03,465 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:49:03,465 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:49:03,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:49:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:49:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2021-06-05 21:49:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-06-05 21:49:03,467 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-06-05 21:49:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:03,467 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-06-05 21:49:03,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-06-05 21:49:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:49:03,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:03,468 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:03,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:03,677 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2104034591, now seen corresponding path program 69 times [2021-06-05 21:49:03,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:03,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294423861] [2021-06-05 21:49:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:03,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:03,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294423861] [2021-06-05 21:49:03,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294423861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:03,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715171760] [2021-06-05 21:49:03,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:03,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:49:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:04,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715171760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:04,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:04,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:49:04,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940087571] [2021-06-05 21:49:04,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:49:04,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:04,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:49:04,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:04,120 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:04,557 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 21:49:04,862 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 21:49:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:04,889 INFO L93 Difference]: Finished difference Result 187 states and 386 transitions. [2021-06-05 21:49:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:49:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:49:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:04,890 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:49:04,890 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:49:04,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 959.3ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:49:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:49:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-06-05 21:49:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2413793103448274) internal successors, (260), 116 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 260 transitions. [2021-06-05 21:49:04,891 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 260 transitions. Word has length 16 [2021-06-05 21:49:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:04,891 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 260 transitions. [2021-06-05 21:49:04,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 260 transitions. [2021-06-05 21:49:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:04,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:04,892 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:05,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:05,092 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash -570507776, now seen corresponding path program 70 times [2021-06-05 21:49:05,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802743262] [2021-06-05 21:49:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:05,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:05,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802743262] [2021-06-05 21:49:05,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802743262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:05,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123343955] [2021-06-05 21:49:05,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:05,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123343955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:05,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:05,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:49:05,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012577038] [2021-06-05 21:49:05,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:49:05,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:49:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:49:05,273 INFO L87 Difference]: Start difference. First operand 117 states and 260 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:05,354 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-06-05 21:49:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:05,355 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:49:05,355 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:49:05,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:49:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2021-06-05 21:49:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-05 21:49:05,357 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-05 21:49:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:05,357 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-05 21:49:05,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-05 21:49:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:05,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:05,358 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:05,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-06-05 21:49:05,574 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:05,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1010264140, now seen corresponding path program 71 times [2021-06-05 21:49:05,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:05,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48434456] [2021-06-05 21:49:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:05,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:05,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48434456] [2021-06-05 21:49:05,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48434456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:05,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459850892] [2021-06-05 21:49:05,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:05,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:05,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:05,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:05,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459850892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:05,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:05,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:05,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381615580] [2021-06-05 21:49:05,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:05,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:05,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:05,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:05,792 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:06,110 INFO L93 Difference]: Finished difference Result 174 states and 368 transitions. [2021-06-05 21:49:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:06,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:06,111 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:49:06,111 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:49:06,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:49:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:49:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2021-06-05 21:49:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-05 21:49:06,112 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-05 21:49:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:06,113 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-05 21:49:06,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-05 21:49:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:06,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:06,113 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:06,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 21:49:06,313 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash -60731324, now seen corresponding path program 72 times [2021-06-05 21:49:06,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:06,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20705423] [2021-06-05 21:49:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:06,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20705423] [2021-06-05 21:49:06,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20705423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728448231] [2021-06-05 21:49:06,383 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 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 21:49:06,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:06,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:06,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:06,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728448231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:06,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:06,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:06,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757938547] [2021-06-05 21:49:06,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:06,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:06,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:06,544 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:06,742 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-06-05 21:49:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:06,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:06,743 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:49:06,743 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:49:06,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:49:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 118. [2021-06-05 21:49:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-05 21:49:06,745 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-05 21:49:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:06,745 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-05 21:49:06,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-05 21:49:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:06,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:06,745 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:06,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 21:49:06,946 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:06,946 INFO L82 PathProgramCache]: Analyzing trace with hash 736004428, now seen corresponding path program 73 times [2021-06-05 21:49:06,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:06,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354783374] [2021-06-05 21:49:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:07,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354783374] [2021-06-05 21:49:07,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354783374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510247571] [2021-06-05 21:49:07,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:07,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:07,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510247571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:07,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:07,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:07,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18844378] [2021-06-05 21:49:07,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:07,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:07,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:07,212 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:07,423 INFO L93 Difference]: Finished difference Result 170 states and 355 transitions. [2021-06-05 21:49:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:07,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:07,424 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:49:07,424 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:49:07,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:49:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:49:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2021-06-05 21:49:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-05 21:49:07,426 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-05 21:49:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:07,426 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-05 21:49:07,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-05 21:49:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:07,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:07,426 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:07,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:07,627 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash 528809191, now seen corresponding path program 74 times [2021-06-05 21:49:07,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:07,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93718767] [2021-06-05 21:49:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:07,700 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 21:49:07,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:07,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93718767] [2021-06-05 21:49:07,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93718767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:07,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211355568] [2021-06-05 21:49:07,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:07,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:07,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:07,924 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 21:49:07,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211355568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:07,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:07,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:07,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77455672] [2021-06-05 21:49:07,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:07,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:07,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:07,925 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:08,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:08,127 INFO L93 Difference]: Finished difference Result 170 states and 351 transitions. [2021-06-05 21:49:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:08,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:08,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:08,128 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:49:08,128 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:49:08,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:49:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-06-05 21:49:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2479338842975207) internal successors, (272), 121 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 272 transitions. [2021-06-05 21:49:08,130 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 272 transitions. Word has length 17 [2021-06-05 21:49:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:08,130 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 272 transitions. [2021-06-05 21:49:08,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 272 transitions. [2021-06-05 21:49:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:08,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:08,130 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:08,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 21:49:08,331 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1863400521, now seen corresponding path program 75 times [2021-06-05 21:49:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:08,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190997949] [2021-06-05 21:49:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:08,399 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 21:49:08,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:08,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190997949] [2021-06-05 21:49:08,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190997949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:08,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639571894] [2021-06-05 21:49:08,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:08,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:08,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:08,628 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 21:49:08,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639571894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:08,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:08,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:08,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602905027] [2021-06-05 21:49:08,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:08,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:08,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:08,629 INFO L87 Difference]: Start difference. First operand 122 states and 272 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:08,793 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-06-05 21:49:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:08,794 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:49:08,794 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:49:08,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:49:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-06-05 21:49:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-05 21:49:08,796 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-05 21:49:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:08,796 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-05 21:49:08,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-05 21:49:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:08,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:08,796 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:09,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:09,005 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1172274526, now seen corresponding path program 76 times [2021-06-05 21:49:09,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:09,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582196852] [2021-06-05 21:49:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:09,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:09,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582196852] [2021-06-05 21:49:09,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582196852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:09,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484433517] [2021-06-05 21:49:09,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:09,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:09,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484433517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:09,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:09,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:09,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302910162] [2021-06-05 21:49:09,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:09,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:09,231 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:09,409 INFO L93 Difference]: Finished difference Result 138 states and 301 transitions. [2021-06-05 21:49:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:09,410 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:49:09,410 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:49:09,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:49:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2021-06-05 21:49:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-05 21:49:09,411 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-05 21:49:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:09,411 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-05 21:49:09,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-05 21:49:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:09,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:09,412 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:09,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 21:49:09,628 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2051697306, now seen corresponding path program 77 times [2021-06-05 21:49:09,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:09,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063482451] [2021-06-05 21:49:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:09,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:09,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063482451] [2021-06-05 21:49:09,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063482451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:09,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278154374] [2021-06-05 21:49:09,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:09,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:09,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:09,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:09,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:09,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278154374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:09,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:09,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:09,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846738772] [2021-06-05 21:49:09,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:09,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:09,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:09,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:09,841 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:09,925 INFO L93 Difference]: Finished difference Result 148 states and 321 transitions. [2021-06-05 21:49:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:09,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:09,926 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:49:09,926 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:49:09,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:49:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-06-05 21:49:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-06-05 21:49:09,928 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-06-05 21:49:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:09,928 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-06-05 21:49:09,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-06-05 21:49:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:09,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:09,928 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:10,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 21:49:10,129 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash -319138145, now seen corresponding path program 78 times [2021-06-05 21:49:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:10,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061390347] [2021-06-05 21:49:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:10,196 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 21:49:10,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:10,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061390347] [2021-06-05 21:49:10,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061390347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:10,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811822848] [2021-06-05 21:49:10,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:10,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:10,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:10,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:10,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:10,449 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 21:49:10,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811822848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:10,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:10,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:10,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525367670] [2021-06-05 21:49:10,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:10,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:10,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:10,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:10,450 INFO L87 Difference]: Start difference. First operand 119 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:10,516 INFO L93 Difference]: Finished difference Result 135 states and 295 transitions. [2021-06-05 21:49:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:10,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:10,516 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:49:10,516 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:49:10,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:49:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2021-06-05 21:49:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-06-05 21:49:10,522 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-06-05 21:49:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:10,522 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-06-05 21:49:10,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-06-05 21:49:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:10,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:10,523 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:10,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:10,725 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash 568562368, now seen corresponding path program 79 times [2021-06-05 21:49:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:10,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137485812] [2021-06-05 21:49:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:10,826 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 21:49:10,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:10,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137485812] [2021-06-05 21:49:10,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137485812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:10,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928372708] [2021-06-05 21:49:10,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:10,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928372708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:10,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:10,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:10,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935465882] [2021-06-05 21:49:10,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:10,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:10,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:10,983 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:11,106 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-06-05 21:49:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:11,107 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:49:11,107 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:49:11,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:49:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-06-05 21:49:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-06-05 21:49:11,109 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-06-05 21:49:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:11,110 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-06-05 21:49:11,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-06-05 21:49:11,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:11,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:11,110 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:11,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:11,325 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1365298120, now seen corresponding path program 80 times [2021-06-05 21:49:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121283862] [2021-06-05 21:49:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:11,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:11,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121283862] [2021-06-05 21:49:11,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121283862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:11,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483188598] [2021-06-05 21:49:11,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:11,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:11,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:11,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483188598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:11,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:11,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:11,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501858358] [2021-06-05 21:49:11,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:11,566 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:11,726 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-06-05 21:49:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:11,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:11,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:11,727 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:49:11,727 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:49:11,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:49:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-06-05 21:49:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-06-05 21:49:11,729 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-06-05 21:49:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:11,729 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-06-05 21:49:11,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-06-05 21:49:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:11,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:11,729 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:11,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 21:49:11,930 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1652848355, now seen corresponding path program 81 times [2021-06-05 21:49:11,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:11,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29997205] [2021-06-05 21:49:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:12,018 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 21:49:12,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:12,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29997205] [2021-06-05 21:49:12,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29997205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:12,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619696106] [2021-06-05 21:49:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:12,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:49:12,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:12,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619696106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:12,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:12,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:12,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492616142] [2021-06-05 21:49:12,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:12,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:12,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:12,269 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:12,451 INFO L93 Difference]: Finished difference Result 143 states and 310 transitions. [2021-06-05 21:49:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:12,452 INFO L225 Difference]: With dead ends: 143 [2021-06-05 21:49:12,452 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 21:49:12,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 21:49:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-06-05 21:49:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-06-05 21:49:12,454 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-06-05 21:49:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:12,454 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-06-05 21:49:12,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-06-05 21:49:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:12,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:12,454 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:12,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 21:49:12,655 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:12,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1871644386, now seen corresponding path program 82 times [2021-06-05 21:49:12,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:12,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945188564] [2021-06-05 21:49:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:12,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:12,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945188564] [2021-06-05 21:49:12,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945188564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:12,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462854862] [2021-06-05 21:49:12,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:12,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:12,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:12,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:12,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462854862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:12,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:12,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:12,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804513166] [2021-06-05 21:49:12,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:12,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:12,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:12,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:12,952 INFO L87 Difference]: Start difference. First operand 117 states and 259 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:13,166 INFO L93 Difference]: Finished difference Result 153 states and 321 transitions. [2021-06-05 21:49:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:13,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:13,167 INFO L225 Difference]: With dead ends: 153 [2021-06-05 21:49:13,167 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:49:13,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:49:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 118. [2021-06-05 21:49:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.230769230769231) internal successors, (261), 117 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 261 transitions. [2021-06-05 21:49:13,169 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 261 transitions. Word has length 17 [2021-06-05 21:49:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:13,169 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 261 transitions. [2021-06-05 21:49:13,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 261 transitions. [2021-06-05 21:49:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:13,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:13,169 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:13,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 21:49:13,370 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:13,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2135772675, now seen corresponding path program 83 times [2021-06-05 21:49:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:13,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619368548] [2021-06-05 21:49:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:13,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:13,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619368548] [2021-06-05 21:49:13,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619368548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:13,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379570021] [2021-06-05 21:49:13,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:13,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:49:13,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:13,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:13,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379570021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:13,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:13,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649778992] [2021-06-05 21:49:13,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:13,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:13,603 INFO L87 Difference]: Start difference. First operand 118 states and 261 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:13,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:13,909 INFO L93 Difference]: Finished difference Result 196 states and 397 transitions. [2021-06-05 21:49:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:49:13,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:13,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:13,910 INFO L225 Difference]: With dead ends: 196 [2021-06-05 21:49:13,910 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:49:13,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:49:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:49:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2021-06-05 21:49:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2542372881355934) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 266 transitions. [2021-06-05 21:49:13,912 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 266 transitions. Word has length 17 [2021-06-05 21:49:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:13,912 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 266 transitions. [2021-06-05 21:49:13,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 266 transitions. [2021-06-05 21:49:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:13,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:13,912 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:14,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 21:49:14,128 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:14,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 199159296, now seen corresponding path program 84 times [2021-06-05 21:49:14,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:14,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540312171] [2021-06-05 21:49:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:14,223 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 21:49:14,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540312171] [2021-06-05 21:49:14,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540312171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951924549] [2021-06-05 21:49:14,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:14,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:14,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:14,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:14,414 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 21:49:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951924549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:14,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:14,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:14,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006604415] [2021-06-05 21:49:14,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:14,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:14,415 INFO L87 Difference]: Start difference. First operand 119 states and 266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:14,614 INFO L93 Difference]: Finished difference Result 140 states and 301 transitions. [2021-06-05 21:49:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:14,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:14,614 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:49:14,615 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:49:14,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:49:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2021-06-05 21:49:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-06-05 21:49:14,616 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-06-05 21:49:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:14,616 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-06-05 21:49:14,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-06-05 21:49:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:14,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:14,617 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:14,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 21:49:14,829 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1833782395, now seen corresponding path program 85 times [2021-06-05 21:49:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940661367] [2021-06-05 21:49:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:14,911 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 21:49:14,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:14,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940661367] [2021-06-05 21:49:14,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940661367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:14,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700047182] [2021-06-05 21:49:14,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:14,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:15,054 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 21:49:15,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700047182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:15,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:15,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:15,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071672684] [2021-06-05 21:49:15,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:15,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:15,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:15,054 INFO L87 Difference]: Start difference. First operand 119 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:15,226 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-06-05 21:49:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:15,227 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:49:15,227 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:49:15,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:49:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2021-06-05 21:49:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-06-05 21:49:15,229 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-06-05 21:49:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:15,229 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-06-05 21:49:15,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-06-05 21:49:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:15,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:15,229 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:15,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 21:49:15,429 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:15,430 INFO L82 PathProgramCache]: Analyzing trace with hash -111496436, now seen corresponding path program 86 times [2021-06-05 21:49:15,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:15,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750126375] [2021-06-05 21:49:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:15,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750126375] [2021-06-05 21:49:15,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750126375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272892909] [2021-06-05 21:49:15,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:15,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:15,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:15,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:49:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:15,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272892909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:15,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:15,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:15,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454568883] [2021-06-05 21:49:15,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:15,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:15,669 INFO L87 Difference]: Start difference. First operand 116 states and 256 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:15,940 INFO L93 Difference]: Finished difference Result 136 states and 296 transitions. [2021-06-05 21:49:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:15,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:15,940 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:49:15,940 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:49:15,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:49:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:49:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2021-06-05 21:49:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-06-05 21:49:15,942 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-06-05 21:49:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:15,942 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-06-05 21:49:15,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-06-05 21:49:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:15,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:15,942 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:16,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 21:49:16,158 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1182491900, now seen corresponding path program 87 times [2021-06-05 21:49:16,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:16,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462825610] [2021-06-05 21:49:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:16,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:16,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462825610] [2021-06-05 21:49:16,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462825610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:16,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374247182] [2021-06-05 21:49:16,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:16,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:16,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:49:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:16,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374247182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:16,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:16,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:16,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775591353] [2021-06-05 21:49:16,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:16,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:16,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:16,439 INFO L87 Difference]: Start difference. First operand 116 states and 256 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:16,752 INFO L93 Difference]: Finished difference Result 142 states and 308 transitions. [2021-06-05 21:49:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:16,753 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:49:16,753 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:49:16,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:49:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-06-05 21:49:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-06-05 21:49:16,755 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-06-05 21:49:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:16,755 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-06-05 21:49:16,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-06-05 21:49:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:16,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:16,755 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:16,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 21:49:16,955 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:16,955 INFO L82 PathProgramCache]: Analyzing trace with hash 984390345, now seen corresponding path program 88 times [2021-06-05 21:49:16,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:16,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952973827] [2021-06-05 21:49:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:17,022 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 21:49:17,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:17,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952973827] [2021-06-05 21:49:17,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952973827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:17,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633736294] [2021-06-05 21:49:17,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:17,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:17,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:17,239 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 21:49:17,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633736294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:17,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:17,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:17,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152488437] [2021-06-05 21:49:17,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:17,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:17,240 INFO L87 Difference]: Start difference. First operand 117 states and 259 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:17,439 INFO L93 Difference]: Finished difference Result 160 states and 328 transitions. [2021-06-05 21:49:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:17,439 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:49:17,440 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:49:17,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:49:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 123. [2021-06-05 21:49:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.2295081967213113) internal successors, (272), 122 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 272 transitions. [2021-06-05 21:49:17,441 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 272 transitions. Word has length 17 [2021-06-05 21:49:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:17,441 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 272 transitions. [2021-06-05 21:49:17,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 272 transitions. [2021-06-05 21:49:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:17,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:17,442 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:17,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:17,642 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 741639945, now seen corresponding path program 89 times [2021-06-05 21:49:17,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:17,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368223934] [2021-06-05 21:49:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:17,709 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 21:49:17,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:17,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368223934] [2021-06-05 21:49:17,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368223934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:17,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970451705] [2021-06-05 21:49:17,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:17,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:17,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:17,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:17,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:17,948 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 21:49:17,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970451705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:17,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:17,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257943307] [2021-06-05 21:49:17,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:17,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:17,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:17,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:17,950 INFO L87 Difference]: Start difference. First operand 123 states and 272 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:18,067 INFO L93 Difference]: Finished difference Result 134 states and 291 transitions. [2021-06-05 21:49:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:18,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:18,068 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:49:18,068 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:49:18,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:49:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-06-05 21:49:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-06-05 21:49:18,071 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-06-05 21:49:18,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:18,071 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-06-05 21:49:18,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-06-05 21:49:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:18,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:18,071 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:18,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:18,277 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1629340458, now seen corresponding path program 90 times [2021-06-05 21:49:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330609894] [2021-06-05 21:49:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:18,374 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 21:49:18,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:18,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330609894] [2021-06-05 21:49:18,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330609894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:18,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949035496] [2021-06-05 21:49:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:18,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:18,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:18,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949035496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:18,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:18,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:18,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011122535] [2021-06-05 21:49:18,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:18,524 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:18,642 INFO L93 Difference]: Finished difference Result 134 states and 292 transitions. [2021-06-05 21:49:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:18,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:18,643 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:49:18,643 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:49:18,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:49:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-06-05 21:49:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-06-05 21:49:18,644 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-06-05 21:49:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:18,644 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-06-05 21:49:18,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-06-05 21:49:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:18,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:18,645 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:18,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:18,861 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1868891086, now seen corresponding path program 91 times [2021-06-05 21:49:18,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:18,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178211999] [2021-06-05 21:49:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:18,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:18,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178211999] [2021-06-05 21:49:18,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178211999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:18,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782779850] [2021-06-05 21:49:18,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:19,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782779850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:19,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:19,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245660913] [2021-06-05 21:49:19,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:19,103 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:19,333 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-06-05 21:49:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:19,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:19,334 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:49:19,334 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:49:19,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:49:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-06-05 21:49:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.219298245614035) internal successors, (253), 114 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 253 transitions. [2021-06-05 21:49:19,336 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 253 transitions. Word has length 17 [2021-06-05 21:49:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:19,336 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 253 transitions. [2021-06-05 21:49:19,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 253 transitions. [2021-06-05 21:49:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:19,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:19,336 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:19,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 21:49:19,552 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:19,552 INFO L82 PathProgramCache]: Analyzing trace with hash -741494993, now seen corresponding path program 92 times [2021-06-05 21:49:19,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:19,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763063039] [2021-06-05 21:49:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:19,642 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 21:49:19,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:19,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763063039] [2021-06-05 21:49:19,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763063039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:19,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050736635] [2021-06-05 21:49:19,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:19,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:19,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:19,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:19,870 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 21:49:19,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050736635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:19,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:19,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:19,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314570822] [2021-06-05 21:49:19,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:19,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:19,871 INFO L87 Difference]: Start difference. First operand 115 states and 253 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:20,019 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2021-06-05 21:49:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:20,020 INFO L225 Difference]: With dead ends: 133 [2021-06-05 21:49:20,020 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:49:20,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:49:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-06-05 21:49:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.2142857142857144) internal successors, (248), 112 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 248 transitions. [2021-06-05 21:49:20,022 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 248 transitions. Word has length 17 [2021-06-05 21:49:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:20,022 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 248 transitions. [2021-06-05 21:49:20,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 248 transitions. [2021-06-05 21:49:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:20,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:20,022 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:20,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:20,237 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash -235148727, now seen corresponding path program 93 times [2021-06-05 21:49:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:20,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672792169] [2021-06-05 21:49:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:20,327 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 21:49:20,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:20,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672792169] [2021-06-05 21:49:20,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672792169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:20,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069110175] [2021-06-05 21:49:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:20,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:20,468 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 21:49:20,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069110175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:20,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:20,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:20,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494550333] [2021-06-05 21:49:20,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:20,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:20,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:20,469 INFO L87 Difference]: Start difference. First operand 113 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:20,675 INFO L93 Difference]: Finished difference Result 184 states and 371 transitions. [2021-06-05 21:49:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:49:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:20,676 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:49:20,676 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:49:20,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:49:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 115. [2021-06-05 21:49:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.236842105263158) internal successors, (255), 114 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 255 transitions. [2021-06-05 21:49:20,678 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 255 transitions. Word has length 17 [2021-06-05 21:49:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:20,678 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 255 transitions. [2021-06-05 21:49:20,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 255 transitions. [2021-06-05 21:49:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:20,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:20,678 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:20,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 21:49:20,889 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1259937386, now seen corresponding path program 94 times [2021-06-05 21:49:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:20,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335330054] [2021-06-05 21:49:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:20,988 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 21:49:20,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:20,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335330054] [2021-06-05 21:49:20,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335330054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:20,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890399498] [2021-06-05 21:49:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:21,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:21,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:21,163 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 21:49:21,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890399498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:21,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:21,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:21,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451492731] [2021-06-05 21:49:21,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:21,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:21,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:21,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:21,164 INFO L87 Difference]: Start difference. First operand 115 states and 255 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:21,321 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-06-05 21:49:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:21,321 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:49:21,322 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:49:21,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:49:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2021-06-05 21:49:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2) internal successors, (264), 120 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 264 transitions. [2021-06-05 21:49:21,323 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 264 transitions. Word has length 17 [2021-06-05 21:49:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:21,323 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 264 transitions. [2021-06-05 21:49:21,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 264 transitions. [2021-06-05 21:49:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:21,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:21,323 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:21,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:21,524 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash -773004305, now seen corresponding path program 95 times [2021-06-05 21:49:21,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:21,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459932155] [2021-06-05 21:49:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:21,613 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 21:49:21,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:21,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459932155] [2021-06-05 21:49:21,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459932155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:21,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083595947] [2021-06-05 21:49:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:21,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:21,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:21,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:21,749 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 21:49:21,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083595947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:21,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:21,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058647784] [2021-06-05 21:49:21,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:21,750 INFO L87 Difference]: Start difference. First operand 121 states and 264 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:21,872 INFO L93 Difference]: Finished difference Result 142 states and 303 transitions. [2021-06-05 21:49:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:21,873 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:49:21,873 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:49:21,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:49:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2021-06-05 21:49:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-05 21:49:21,874 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-06-05 21:49:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:21,874 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-05 21:49:21,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-05 21:49:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:21,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:21,875 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:22,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 21:49:22,075 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:22,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1398169660, now seen corresponding path program 96 times [2021-06-05 21:49:22,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:22,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248882152] [2021-06-05 21:49:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:22,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248882152] [2021-06-05 21:49:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248882152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693208490] [2021-06-05 21:49:22,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:22,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:49:22,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:22,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693208490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:22,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:22,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:22,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329769651] [2021-06-05 21:49:22,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:22,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:22,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:22,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:22,340 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:22,431 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2021-06-05 21:49:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:22,431 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:49:22,431 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:49:22,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:49:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-06-05 21:49:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-05 21:49:22,433 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-06-05 21:49:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:22,433 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-05 21:49:22,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-05 21:49:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:22,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:22,435 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:22,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-05 21:49:22,651 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash -601433908, now seen corresponding path program 97 times [2021-06-05 21:49:22,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:22,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567489443] [2021-06-05 21:49:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:22,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567489443] [2021-06-05 21:49:22,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567489443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778666599] [2021-06-05 21:49:22,746 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 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 21:49:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:22,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:22,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:22,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778666599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:22,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:22,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:22,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786285554] [2021-06-05 21:49:22,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:22,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:22,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:22,892 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:22,997 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-06-05 21:49:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:22,998 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:49:22,998 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:49:22,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:49:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-06-05 21:49:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-05 21:49:22,999 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-06-05 21:49:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:23,000 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-05 21:49:23,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-05 21:49:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:23,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:23,000 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:23,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:23,205 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash -313883673, now seen corresponding path program 98 times [2021-06-05 21:49:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:23,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041418741] [2021-06-05 21:49:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:23,308 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 21:49:23,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041418741] [2021-06-05 21:49:23,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041418741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978900804] [2021-06-05 21:49:23,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:23,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:23,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:23,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:49:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:23,580 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 21:49:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:23,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978900804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:23,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:23,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:23,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683503963] [2021-06-05 21:49:23,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:23,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:23,624 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:23,790 INFO L93 Difference]: Finished difference Result 134 states and 282 transitions. [2021-06-05 21:49:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:23,790 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:49:23,790 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:49:23,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:49:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2021-06-05 21:49:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-05 21:49:23,792 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-06-05 21:49:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:23,792 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-05 21:49:23,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-05 21:49:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:23,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:23,792 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:23,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:23,993 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash -302282879, now seen corresponding path program 99 times [2021-06-05 21:49:23,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:23,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712756590] [2021-06-05 21:49:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:24,087 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 21:49:24,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712756590] [2021-06-05 21:49:24,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712756590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899268983] [2021-06-05 21:49:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:24,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:24,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:24,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:24,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:24,237 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 21:49:24,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899268983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:24,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:24,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:24,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821836995] [2021-06-05 21:49:24,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:24,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:24,238 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:24,493 INFO L93 Difference]: Finished difference Result 150 states and 305 transitions. [2021-06-05 21:49:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:24,494 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:49:24,494 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:49:24,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:49:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:49:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-06-05 21:49:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-06-05 21:49:24,496 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 17 [2021-06-05 21:49:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:24,496 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-06-05 21:49:24,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-06-05 21:49:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:24,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:24,496 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:24,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 21:49:24,696 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1032308451, now seen corresponding path program 100 times [2021-06-05 21:49:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:24,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677784968] [2021-06-05 21:49:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:24,792 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 21:49:24,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:24,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677784968] [2021-06-05 21:49:24,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677784968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995482056] [2021-06-05 21:49:24,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:24,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:24,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:24,938 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 21:49:24,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995482056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:24,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:24,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:24,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508314897] [2021-06-05 21:49:24,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:24,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:24,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:24,939 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:25,259 INFO L93 Difference]: Finished difference Result 156 states and 319 transitions. [2021-06-05 21:49:25,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:25,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:25,260 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:49:25,260 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:49:25,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:49:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:49:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-06-05 21:49:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1379310344827585) internal successors, (248), 116 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 248 transitions. [2021-06-05 21:49:25,261 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 248 transitions. Word has length 17 [2021-06-05 21:49:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:25,262 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 248 transitions. [2021-06-05 21:49:25,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 248 transitions. [2021-06-05 21:49:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:25,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:25,262 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:25,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:25,477 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 494452873, now seen corresponding path program 101 times [2021-06-05 21:49:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:25,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49184126] [2021-06-05 21:49:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:25,575 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 21:49:25,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:25,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49184126] [2021-06-05 21:49:25,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49184126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:25,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289243222] [2021-06-05 21:49:25,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:25,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:49:25,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:25,730 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 21:49:25,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289243222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:25,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:25,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:25,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181103926] [2021-06-05 21:49:25,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:25,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:25,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:25,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:25,731 INFO L87 Difference]: Start difference. First operand 117 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:25,877 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-06-05 21:49:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:25,878 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:49:25,878 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:49:25,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:49:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-06-05 21:49:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 234 transitions. [2021-06-05 21:49:25,879 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 234 transitions. Word has length 17 [2021-06-05 21:49:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:25,879 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 234 transitions. [2021-06-05 21:49:25,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 234 transitions. [2021-06-05 21:49:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:25,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:25,879 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:26,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 21:49:26,081 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1578222580, now seen corresponding path program 102 times [2021-06-05 21:49:26,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:26,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526811738] [2021-06-05 21:49:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:26,151 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 21:49:26,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:26,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526811738] [2021-06-05 21:49:26,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526811738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:26,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064887094] [2021-06-05 21:49:26,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:26,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:49:26,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:26,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064887094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:26,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:26,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:26,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225760098] [2021-06-05 21:49:26,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:26,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:26,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:26,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:26,350 INFO L87 Difference]: Start difference. First operand 111 states and 234 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:26,446 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2021-06-05 21:49:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:26,447 INFO L225 Difference]: With dead ends: 127 [2021-06-05 21:49:26,447 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:49:26,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:49:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-06-05 21:49:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-06-05 21:49:26,448 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 17 [2021-06-05 21:49:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:26,448 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-06-05 21:49:26,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-06-05 21:49:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:26,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:26,448 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:26,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:26,658 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:26,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1290672345, now seen corresponding path program 103 times [2021-06-05 21:49:26,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:26,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708510047] [2021-06-05 21:49:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:26,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:26,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708510047] [2021-06-05 21:49:26,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708510047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:26,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501782645] [2021-06-05 21:49:26,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:26,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501782645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:26,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:26,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:26,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120162841] [2021-06-05 21:49:26,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:26,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:26,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:26,875 INFO L87 Difference]: Start difference. First operand 114 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:27,183 INFO L93 Difference]: Finished difference Result 157 states and 322 transitions. [2021-06-05 21:49:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:27,184 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:49:27,184 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:49:27,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:49:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-06-05 21:49:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1452991452991452) internal successors, (251), 117 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-06-05 21:49:27,185 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 17 [2021-06-05 21:49:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:27,185 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-06-05 21:49:27,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-06-05 21:49:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:27,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:27,186 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:27,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-06-05 21:49:27,389 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash -988682065, now seen corresponding path program 104 times [2021-06-05 21:49:27,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:27,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376067132] [2021-06-05 21:49:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:27,465 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 21:49:27,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376067132] [2021-06-05 21:49:27,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376067132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336039881] [2021-06-05 21:49:27,465 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 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 21:49:27,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:27,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:27,617 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 21:49:27,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336039881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:27,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:27,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:27,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069210418] [2021-06-05 21:49:27,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:27,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:27,617 INFO L87 Difference]: Start difference. First operand 118 states and 251 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:27,886 INFO L93 Difference]: Finished difference Result 145 states and 303 transitions. [2021-06-05 21:49:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:27,887 INFO L225 Difference]: With dead ends: 145 [2021-06-05 21:49:27,887 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:49:27,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:49:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 117. [2021-06-05 21:49:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-05 21:49:27,888 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-05 21:49:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:27,888 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-05 21:49:27,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-05 21:49:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:27,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:27,889 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:28,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-06-05 21:49:28,089 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash -482335799, now seen corresponding path program 105 times [2021-06-05 21:49:28,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:28,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456471359] [2021-06-05 21:49:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:28,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:28,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456471359] [2021-06-05 21:49:28,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456471359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:28,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378179151] [2021-06-05 21:49:28,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:28,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:28,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:28,296 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 21:49:28,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378179151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:28,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:28,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:28,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63001693] [2021-06-05 21:49:28,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:28,297 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:28,508 INFO L93 Difference]: Finished difference Result 137 states and 286 transitions. [2021-06-05 21:49:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:28,509 INFO L225 Difference]: With dead ends: 137 [2021-06-05 21:49:28,509 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 21:49:28,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:49:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 21:49:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-06-05 21:49:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-06-05 21:49:28,510 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-06-05 21:49:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:28,510 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-06-05 21:49:28,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-06-05 21:49:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:28,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:28,510 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:28,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 21:49:28,711 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash 425996420, now seen corresponding path program 106 times [2021-06-05 21:49:28,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:28,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555120651] [2021-06-05 21:49:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:28,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:28,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555120651] [2021-06-05 21:49:28,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555120651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:28,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800150101] [2021-06-05 21:49:28,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:28,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:28,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:28,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:28,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800150101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:28,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:28,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:28,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311693134] [2021-06-05 21:49:28,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:28,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:28,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:28,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:28,900 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:29,017 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2021-06-05 21:49:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:29,018 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:49:29,018 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 21:49:29,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 21:49:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2021-06-05 21:49:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-06-05 21:49:29,019 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-06-05 21:49:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:29,019 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-06-05 21:49:29,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-06-05 21:49:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:29,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:29,020 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:29,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:29,225 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1120130721, now seen corresponding path program 107 times [2021-06-05 21:49:29,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:29,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863380352] [2021-06-05 21:49:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:29,283 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 21:49:29,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:29,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863380352] [2021-06-05 21:49:29,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863380352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:29,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772450454] [2021-06-05 21:49:29,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:29,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:29,478 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 21:49:29,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772450454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:29,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:29,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:29,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371072542] [2021-06-05 21:49:29,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:29,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:29,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:29,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:29,479 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:29,679 INFO L93 Difference]: Finished difference Result 119 states and 246 transitions. [2021-06-05 21:49:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:29,680 INFO L225 Difference]: With dead ends: 119 [2021-06-05 21:49:29,680 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 21:49:29,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 21:49:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-06-05 21:49:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 21:49:29,681 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-06-05 21:49:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:29,681 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 21:49:29,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 21:49:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:29,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:29,681 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:29,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:29,882 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:29,882 INFO L82 PathProgramCache]: Analyzing trace with hash -644999044, now seen corresponding path program 108 times [2021-06-05 21:49:29,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:29,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503758806] [2021-06-05 21:49:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:29,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:29,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503758806] [2021-06-05 21:49:29,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503758806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:29,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043261567] [2021-06-05 21:49:29,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:29,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:29,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:30,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043261567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:30,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:30,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:30,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437972989] [2021-06-05 21:49:30,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:30,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:30,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:30,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:30,126 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:30,408 INFO L93 Difference]: Finished difference Result 133 states and 277 transitions. [2021-06-05 21:49:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:30,409 INFO L225 Difference]: With dead ends: 133 [2021-06-05 21:49:30,409 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 21:49:30,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 21:49:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2021-06-05 21:49:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 21:49:30,410 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-06-05 21:49:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:30,410 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 21:49:30,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 21:49:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:30,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:30,410 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:30,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 21:49:30,617 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1521883201, now seen corresponding path program 109 times [2021-06-05 21:49:30,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:30,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487772083] [2021-06-05 21:49:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:30,684 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 21:49:30,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:30,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487772083] [2021-06-05 21:49:30,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487772083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:30,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618690064] [2021-06-05 21:49:30,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:30,889 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 21:49:30,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618690064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:30,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:30,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:30,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877878776] [2021-06-05 21:49:30,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:30,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:30,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:30,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:30,890 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:31,065 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-06-05 21:49:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:31,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:31,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:31,065 INFO L225 Difference]: With dead ends: 151 [2021-06-05 21:49:31,065 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:49:31,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:49:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 119. [2021-06-05 21:49:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1271186440677967) internal successors, (251), 118 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 251 transitions. [2021-06-05 21:49:31,067 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 251 transitions. Word has length 17 [2021-06-05 21:49:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:31,067 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 251 transitions. [2021-06-05 21:49:31,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 251 transitions. [2021-06-05 21:49:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:31,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:31,067 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:31,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-05 21:49:31,281 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1279132801, now seen corresponding path program 110 times [2021-06-05 21:49:31,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:31,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734482658] [2021-06-05 21:49:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:31,349 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 21:49:31,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734482658] [2021-06-05 21:49:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734482658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:31,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026255646] [2021-06-05 21:49:31,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:31,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:49:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:31,564 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 21:49:31,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026255646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:31,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:31,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:31,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256093338] [2021-06-05 21:49:31,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:31,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:31,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:31,565 INFO L87 Difference]: Start difference. First operand 119 states and 251 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:31,676 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-06-05 21:49:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:31,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:31,677 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:49:31,677 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:49:31,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:49:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-06-05 21:49:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-05 21:49:31,678 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-06-05 21:49:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:31,678 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-05 21:49:31,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-05 21:49:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:31,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:31,679 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:31,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:31,879 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:31,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133982, now seen corresponding path program 111 times [2021-06-05 21:49:31,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:31,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927757735] [2021-06-05 21:49:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:31,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927757735] [2021-06-05 21:49:31,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927757735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477979367] [2021-06-05 21:49:31,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:31,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:32,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477979367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:32,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:32,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:32,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482285192] [2021-06-05 21:49:32,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:32,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:32,112 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:32,241 INFO L93 Difference]: Finished difference Result 125 states and 261 transitions. [2021-06-05 21:49:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:32,242 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:49:32,242 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:49:32,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:49:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-06-05 21:49:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-05 21:49:32,243 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-06-05 21:49:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:32,243 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-05 21:49:32,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-05 21:49:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:32,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:32,244 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:32,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 21:49:32,444 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:32,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1331398230, now seen corresponding path program 112 times [2021-06-05 21:49:32,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:32,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70275685] [2021-06-05 21:49:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:32,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:32,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70275685] [2021-06-05 21:49:32,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70275685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:32,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403411] [2021-06-05 21:49:32,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:32,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:32,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:32,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:32,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:32,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:32,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338731882] [2021-06-05 21:49:32,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:32,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:32,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:32,683 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:32,879 INFO L93 Difference]: Finished difference Result 134 states and 279 transitions. [2021-06-05 21:49:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:32,879 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:49:32,879 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:49:32,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:49:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2021-06-05 21:49:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-05 21:49:32,881 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-06-05 21:49:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:32,881 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-05 21:49:32,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-05 21:49:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:32,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:32,881 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:33,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:33,082 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1043847995, now seen corresponding path program 113 times [2021-06-05 21:49:33,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:33,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931117454] [2021-06-05 21:49:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:33,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931117454] [2021-06-05 21:49:33,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931117454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922534395] [2021-06-05 21:49:33,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:33,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:49:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:33,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922534395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:33,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:33,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:33,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002677474] [2021-06-05 21:49:33,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:33,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:33,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:33,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:33,411 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:33,555 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2021-06-05 21:49:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:33,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:33,556 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:49:33,556 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 21:49:33,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 21:49:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2021-06-05 21:49:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.1121495327102804) internal successors, (226), 107 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 226 transitions. [2021-06-05 21:49:33,557 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 226 transitions. Word has length 17 [2021-06-05 21:49:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:33,557 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 226 transitions. [2021-06-05 21:49:33,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 226 transitions. [2021-06-05 21:49:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:33,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:33,557 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:33,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-05 21:49:33,758 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash 302344129, now seen corresponding path program 114 times [2021-06-05 21:49:33,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:33,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55820153] [2021-06-05 21:49:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:33,846 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 21:49:33,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:33,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55820153] [2021-06-05 21:49:33,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55820153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:33,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756884125] [2021-06-05 21:49:33,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:33,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:33,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:33,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:33,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:33,984 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 21:49:33,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756884125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:33,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:33,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:33,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565780614] [2021-06-05 21:49:33,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:33,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:33,985 INFO L87 Difference]: Start difference. First operand 108 states and 226 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:34,169 INFO L93 Difference]: Finished difference Result 172 states and 335 transitions. [2021-06-05 21:49:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:34,169 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:49:34,169 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:49:34,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:49:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-06-05 21:49:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 21:49:34,171 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-06-05 21:49:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:34,171 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 21:49:34,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 21:49:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:34,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:34,171 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:34,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:34,371 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:34,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1797430242, now seen corresponding path program 115 times [2021-06-05 21:49:34,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:34,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474279079] [2021-06-05 21:49:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:34,454 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 21:49:34,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:34,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474279079] [2021-06-05 21:49:34,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474279079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:34,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822134923] [2021-06-05 21:49:34,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:34,630 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 21:49:34,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822134923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:34,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:34,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:34,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260464505] [2021-06-05 21:49:34,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:34,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:34,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:34,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:34,631 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:34,759 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-06-05 21:49:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:34,759 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:49:34,759 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:49:34,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:49:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 115. [2021-06-05 21:49:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-06-05 21:49:34,761 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 17 [2021-06-05 21:49:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:34,761 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-06-05 21:49:34,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-06-05 21:49:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:34,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:34,761 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:34,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 21:49:34,965 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:34,965 INFO L82 PathProgramCache]: Analyzing trace with hash -235511449, now seen corresponding path program 116 times [2021-06-05 21:49:34,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:34,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289068893] [2021-06-05 21:49:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:35,072 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 21:49:35,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:35,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289068893] [2021-06-05 21:49:35,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289068893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:35,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513634078] [2021-06-05 21:49:35,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:35,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:35,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:35,214 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 21:49:35,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513634078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:35,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:35,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:35,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704438889] [2021-06-05 21:49:35,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:35,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:35,215 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:35,315 INFO L93 Difference]: Finished difference Result 129 states and 273 transitions. [2021-06-05 21:49:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:35,316 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:49:35,316 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:49:35,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:49:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-06-05 21:49:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-05 21:49:35,317 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-06-05 21:49:35,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:35,317 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-05 21:49:35,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-05 21:49:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:35,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:35,318 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:35,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:35,518 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:35,518 INFO L82 PathProgramCache]: Analyzing trace with hash -860676804, now seen corresponding path program 117 times [2021-06-05 21:49:35,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045486700] [2021-06-05 21:49:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:35,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:35,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045486700] [2021-06-05 21:49:35,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045486700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:35,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294432489] [2021-06-05 21:49:35,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:35,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:49:35,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294432489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:35,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:35,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:35,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778477563] [2021-06-05 21:49:35,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:35,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:35,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:35,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:35,754 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:35,912 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-06-05 21:49:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:35,913 INFO L225 Difference]: With dead ends: 127 [2021-06-05 21:49:35,913 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:49:35,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:49:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-06-05 21:49:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-05 21:49:35,914 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-06-05 21:49:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:35,915 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-05 21:49:35,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-05 21:49:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:35,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:35,915 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:36,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 21:49:36,115 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash -63941052, now seen corresponding path program 118 times [2021-06-05 21:49:36,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:36,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762568376] [2021-06-05 21:49:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:36,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:36,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762568376] [2021-06-05 21:49:36,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762568376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:36,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816485319] [2021-06-05 21:49:36,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:36,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:36,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:36,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:36,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816485319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:36,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:36,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:36,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045882116] [2021-06-05 21:49:36,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:36,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:36,364 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:36,485 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-06-05 21:49:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:36,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:36,486 INFO L225 Difference]: With dead ends: 137 [2021-06-05 21:49:36,486 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 21:49:36,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 21:49:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-06-05 21:49:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-05 21:49:36,487 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-06-05 21:49:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:36,487 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-05 21:49:36,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-05 21:49:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:36,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:36,488 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:36,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 21:49:36,697 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash 223609183, now seen corresponding path program 119 times [2021-06-05 21:49:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:36,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712473837] [2021-06-05 21:49:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:36,796 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 21:49:36,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:36,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712473837] [2021-06-05 21:49:36,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712473837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:36,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839575986] [2021-06-05 21:49:36,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:36,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:36,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839575986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:37,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:37,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:37,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316122855] [2021-06-05 21:49:37,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:37,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:37,021 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:37,124 INFO L93 Difference]: Finished difference Result 122 states and 259 transitions. [2021-06-05 21:49:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:37,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:37,124 INFO L225 Difference]: With dead ends: 122 [2021-06-05 21:49:37,124 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 21:49:37,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 21:49:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-06-05 21:49:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 21:49:37,126 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-06-05 21:49:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:37,126 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 21:49:37,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 21:49:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:37,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:37,126 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:37,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:37,327 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1569801307, now seen corresponding path program 120 times [2021-06-05 21:49:37,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:37,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232059415] [2021-06-05 21:49:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:37,422 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 21:49:37,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:37,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232059415] [2021-06-05 21:49:37,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232059415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:37,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865979437] [2021-06-05 21:49:37,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:37,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:49:37,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:37,575 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 21:49:37,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865979437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:37,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:37,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:37,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245955515] [2021-06-05 21:49:37,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:37,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:37,576 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:37,792 INFO L93 Difference]: Finished difference Result 147 states and 302 transitions. [2021-06-05 21:49:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:37,793 INFO L225 Difference]: With dead ends: 147 [2021-06-05 21:49:37,793 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:49:37,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:49:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 116. [2021-06-05 21:49:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-05 21:49:37,794 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 17 [2021-06-05 21:49:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:37,794 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-05 21:49:37,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-05 21:49:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:37,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:37,795 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:37,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:37,997 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1031945729, now seen corresponding path program 121 times [2021-06-05 21:49:37,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:37,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395556279] [2021-06-05 21:49:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:38,107 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 21:49:38,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:38,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395556279] [2021-06-05 21:49:38,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395556279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:38,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581651576] [2021-06-05 21:49:38,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:38,256 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 21:49:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581651576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:38,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:38,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:38,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139904874] [2021-06-05 21:49:38,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:38,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:38,259 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:38,391 INFO L93 Difference]: Finished difference Result 128 states and 269 transitions. [2021-06-05 21:49:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:49:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:38,392 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:49:38,392 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 21:49:38,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 21:49:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-06-05 21:49:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-06-05 21:49:38,393 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-06-05 21:49:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:38,393 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-06-05 21:49:38,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-06-05 21:49:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:38,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:38,393 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:38,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:38,597 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1247924961, now seen corresponding path program 122 times [2021-06-05 21:49:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:38,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156008593] [2021-06-05 21:49:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:38,662 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 21:49:38,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156008593] [2021-06-05 21:49:38,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156008593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893698789] [2021-06-05 21:49:38,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:38,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:38,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:38,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:38,802 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 21:49:38,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893698789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:38,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:38,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:38,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639593883] [2021-06-05 21:49:38,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:38,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:38,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:38,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:38,803 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:39,089 INFO L93 Difference]: Finished difference Result 141 states and 287 transitions. [2021-06-05 21:49:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:39,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:39,090 INFO L225 Difference]: With dead ends: 141 [2021-06-05 21:49:39,090 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:49:39,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:49:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:49:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-06-05 21:49:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-05 21:49:39,091 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-05 21:49:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:39,091 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-05 21:49:39,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-05 21:49:39,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:39,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:39,092 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:39,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:39,292 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:39,292 INFO L82 PathProgramCache]: Analyzing trace with hash 86666369, now seen corresponding path program 123 times [2021-06-05 21:49:39,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:39,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379796687] [2021-06-05 21:49:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:39,363 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 21:49:39,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379796687] [2021-06-05 21:49:39,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379796687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736557674] [2021-06-05 21:49:39,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:39,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:49:39,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:39,506 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 21:49:39,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736557674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:39,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:39,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:39,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688553478] [2021-06-05 21:49:39,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:39,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:39,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:39,506 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:39,824 INFO L93 Difference]: Finished difference Result 147 states and 301 transitions. [2021-06-05 21:49:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:39,825 INFO L225 Difference]: With dead ends: 147 [2021-06-05 21:49:39,825 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:49:39,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:49:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2021-06-05 21:49:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-05 21:49:39,826 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-05 21:49:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:39,826 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-05 21:49:39,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-05 21:49:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:39,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:39,826 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:40,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-05 21:49:40,027 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:40,027 INFO L82 PathProgramCache]: Analyzing trace with hash -451189209, now seen corresponding path program 124 times [2021-06-05 21:49:40,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:40,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969888328] [2021-06-05 21:49:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:40,092 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 21:49:40,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:40,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969888328] [2021-06-05 21:49:40,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969888328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:40,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695361107] [2021-06-05 21:49:40,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:40,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:40,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:40,247 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 21:49:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695361107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:40,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:40,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468453100] [2021-06-05 21:49:40,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:40,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:40,248 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:40,503 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-06-05 21:49:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:40,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:40,504 INFO L225 Difference]: With dead ends: 139 [2021-06-05 21:49:40,504 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:49:40,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:49:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-06-05 21:49:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-05 21:49:40,505 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-05 21:49:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:40,505 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-05 21:49:40,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-05 21:49:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:40,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:40,506 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:40,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:40,706 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:40,706 INFO L82 PathProgramCache]: Analyzing trace with hash 55157057, now seen corresponding path program 125 times [2021-06-05 21:49:40,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:40,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755995534] [2021-06-05 21:49:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:40,769 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 21:49:40,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:40,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755995534] [2021-06-05 21:49:40,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755995534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:40,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743657129] [2021-06-05 21:49:40,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:40,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:40,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:40,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:40,917 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 21:49:40,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743657129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:40,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:40,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159030349] [2021-06-05 21:49:40,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:40,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:40,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:40,918 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:41,108 INFO L93 Difference]: Finished difference Result 132 states and 276 transitions. [2021-06-05 21:49:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:41,109 INFO L225 Difference]: With dead ends: 132 [2021-06-05 21:49:41,109 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 21:49:41,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 21:49:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-06-05 21:49:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-05 21:49:41,110 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-06-05 21:49:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:41,110 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-05 21:49:41,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-05 21:49:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:41,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:41,110 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:41,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 21:49:41,311 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash -436365568, now seen corresponding path program 126 times [2021-06-05 21:49:41,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:41,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001686719] [2021-06-05 21:49:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:41,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001686719] [2021-06-05 21:49:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001686719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016679773] [2021-06-05 21:49:41,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:41,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:49:41,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:41,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:41,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016679773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:41,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:41,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:41,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064446340] [2021-06-05 21:49:41,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:41,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:41,540 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:41,718 INFO L93 Difference]: Finished difference Result 126 states and 264 transitions. [2021-06-05 21:49:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:41,719 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:49:41,719 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:49:41,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:49:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-06-05 21:49:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-05 21:49:41,720 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-06-05 21:49:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:41,720 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-05 21:49:41,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-05 21:49:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:41,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:41,720 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:41,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:41,921 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1487766277, now seen corresponding path program 127 times [2021-06-05 21:49:41,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:41,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893085419] [2021-06-05 21:49:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:42,008 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 21:49:42,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:42,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893085419] [2021-06-05 21:49:42,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893085419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:42,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903460804] [2021-06-05 21:49:42,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:42,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:42,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:42,227 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 21:49:42,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903460804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:42,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:42,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:42,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962456899] [2021-06-05 21:49:42,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:42,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:42,227 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:42,381 INFO L93 Difference]: Finished difference Result 120 states and 252 transitions. [2021-06-05 21:49:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:42,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:42,381 INFO L225 Difference]: With dead ends: 120 [2021-06-05 21:49:42,381 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:49:42,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:49:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:49:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-06-05 21:49:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.128440366972477) internal successors, (232), 109 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 232 transitions. [2021-06-05 21:49:42,383 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 232 transitions. Word has length 17 [2021-06-05 21:49:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:42,383 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 232 transitions. [2021-06-05 21:49:42,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 232 transitions. [2021-06-05 21:49:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:42,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:42,383 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:42,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 21:49:42,583 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1994112543, now seen corresponding path program 128 times [2021-06-05 21:49:42,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:42,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397438702] [2021-06-05 21:49:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:42,670 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 21:49:42,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397438702] [2021-06-05 21:49:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397438702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619449495] [2021-06-05 21:49:42,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:42,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:42,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:42,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:42,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:42,819 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 21:49:42,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619449495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:42,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:42,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:42,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79103163] [2021-06-05 21:49:42,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:42,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:42,820 INFO L87 Difference]: Start difference. First operand 110 states and 232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:42,991 INFO L93 Difference]: Finished difference Result 145 states and 297 transitions. [2021-06-05 21:49:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:49:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:42,991 INFO L225 Difference]: With dead ends: 145 [2021-06-05 21:49:42,991 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:49:42,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:49:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-06-05 21:49:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-06-05 21:49:42,993 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-06-05 21:49:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:42,993 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-06-05 21:49:42,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-06-05 21:49:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:42,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:42,993 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:43,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 21:49:43,205 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:43,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1456256965, now seen corresponding path program 129 times [2021-06-05 21:49:43,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:43,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428459952] [2021-06-05 21:49:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:43,303 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 21:49:43,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:43,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428459952] [2021-06-05 21:49:43,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428459952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:43,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646670340] [2021-06-05 21:49:43,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:43,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:49:43,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:43,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:43,446 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 21:49:43,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646670340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:43,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:43,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:43,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705151733] [2021-06-05 21:49:43,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:43,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:43,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:43,447 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:43,589 INFO L93 Difference]: Finished difference Result 129 states and 270 transitions. [2021-06-05 21:49:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:43,590 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:49:43,590 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:49:43,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:49:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-06-05 21:49:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-06-05 21:49:43,591 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-06-05 21:49:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:43,591 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-06-05 21:49:43,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-06-05 21:49:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:43,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:43,592 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:43,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:43,801 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash -616418488, now seen corresponding path program 130 times [2021-06-05 21:49:43,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:43,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109655466] [2021-06-05 21:49:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:43,864 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 21:49:43,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:43,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109655466] [2021-06-05 21:49:43,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109655466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:43,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825921891] [2021-06-05 21:49:43,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:43,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:43,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:44,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825921891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:44,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:44,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788777307] [2021-06-05 21:49:44,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:44,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:44,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:44,063 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:44,139 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2021-06-05 21:49:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:44,139 INFO L225 Difference]: With dead ends: 111 [2021-06-05 21:49:44,139 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:49:44,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:49:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-06-05 21:49:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-06-05 21:49:44,141 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-06-05 21:49:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:44,141 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-06-05 21:49:44,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-06-05 21:49:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:44,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:44,141 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:44,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:44,341 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -328868253, now seen corresponding path program 131 times [2021-06-05 21:49:44,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:44,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046553149] [2021-06-05 21:49:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:44,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046553149] [2021-06-05 21:49:44,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046553149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941690475] [2021-06-05 21:49:44,421 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 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 21:49:44,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:49:44,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:44,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:44,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941690475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:44,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:44,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:44,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437933574] [2021-06-05 21:49:44,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:44,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:44,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:44,583 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:44,768 INFO L93 Difference]: Finished difference Result 146 states and 291 transitions. [2021-06-05 21:49:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:44,769 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:49:44,769 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:49:44,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:49:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-06-05 21:49:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-06-05 21:49:44,770 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-06-05 21:49:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:44,770 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-06-05 21:49:44,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-06-05 21:49:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:44,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:44,771 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:44,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-05 21:49:44,971 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash -26877973, now seen corresponding path program 132 times [2021-06-05 21:49:44,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:44,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456853184] [2021-06-05 21:49:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:45,048 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 21:49:45,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:45,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456853184] [2021-06-05 21:49:45,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456853184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:45,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868532603] [2021-06-05 21:49:45,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:45,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:45,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:45,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:45,207 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 21:49:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868532603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:45,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:45,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:45,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923174923] [2021-06-05 21:49:45,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:45,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:45,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:45,208 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:45,299 INFO L93 Difference]: Finished difference Result 135 states and 282 transitions. [2021-06-05 21:49:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:49:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:45,300 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:49:45,300 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:49:45,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:49:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-06-05 21:49:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.144144144144144) internal successors, (238), 111 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 238 transitions. [2021-06-05 21:49:45,301 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 238 transitions. Word has length 17 [2021-06-05 21:49:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:45,301 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 238 transitions. [2021-06-05 21:49:45,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 238 transitions. [2021-06-05 21:49:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:45,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:45,302 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:45,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 21:49:45,502 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:45,502 INFO L82 PathProgramCache]: Analyzing trace with hash 479468293, now seen corresponding path program 133 times [2021-06-05 21:49:45,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:45,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57149947] [2021-06-05 21:49:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:45,572 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 21:49:45,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:45,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57149947] [2021-06-05 21:49:45,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57149947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:45,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666382280] [2021-06-05 21:49:45,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:45,713 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 21:49:45,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666382280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:45,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:45,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:45,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31461414] [2021-06-05 21:49:45,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:45,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:45,714 INFO L87 Difference]: Start difference. First operand 112 states and 238 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:45,900 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-06-05 21:49:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:49:45,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:45,901 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:49:45,901 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:49:45,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:49:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2021-06-05 21:49:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-06-05 21:49:45,902 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-06-05 21:49:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:45,902 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-06-05 21:49:45,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-06-05 21:49:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:45,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:45,902 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:46,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-05 21:49:46,103 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:46,103 INFO L82 PathProgramCache]: Analyzing trace with hash 21357727, now seen corresponding path program 134 times [2021-06-05 21:49:46,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:46,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030284609] [2021-06-05 21:49:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:46,160 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 21:49:46,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030284609] [2021-06-05 21:49:46,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030284609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199170555] [2021-06-05 21:49:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:46,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:46,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:46,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:46,303 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 21:49:46,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199170555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:46,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:46,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:46,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177722851] [2021-06-05 21:49:46,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:46,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:46,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:46,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:46,304 INFO L87 Difference]: Start difference. First operand 104 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:46,464 INFO L93 Difference]: Finished difference Result 156 states and 309 transitions. [2021-06-05 21:49:46,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:46,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:46,464 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:49:46,464 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:49:46,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:49:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:49:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2021-06-05 21:49:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-06-05 21:49:46,466 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-06-05 21:49:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:46,466 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-06-05 21:49:46,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-06-05 21:49:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:46,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:46,466 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:46,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:46,681 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1355949057, now seen corresponding path program 135 times [2021-06-05 21:49:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:46,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640452984] [2021-06-05 21:49:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:46,742 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 21:49:46,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:46,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640452984] [2021-06-05 21:49:46,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640452984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:46,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155003932] [2021-06-05 21:49:46,743 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 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 21:49:46,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:49:46,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:46,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:46,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155003932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:46,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:46,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:46,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763259863] [2021-06-05 21:49:46,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:46,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:46,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:46,888 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:47,120 INFO L93 Difference]: Finished difference Result 158 states and 315 transitions. [2021-06-05 21:49:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:49:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:47,120 INFO L225 Difference]: With dead ends: 158 [2021-06-05 21:49:47,120 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 21:49:47,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:49:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 21:49:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2021-06-05 21:49:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1363636363636362) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 235 transitions. [2021-06-05 21:49:47,122 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 235 transitions. Word has length 17 [2021-06-05 21:49:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:47,122 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 235 transitions. [2021-06-05 21:49:47,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 235 transitions. [2021-06-05 21:49:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:47,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:47,122 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:47,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-05 21:49:47,323 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 818093479, now seen corresponding path program 136 times [2021-06-05 21:49:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:47,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205708322] [2021-06-05 21:49:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:47,385 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 21:49:47,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:47,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205708322] [2021-06-05 21:49:47,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205708322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:47,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506190434] [2021-06-05 21:49:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:47,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:47,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:47,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:47,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:47,526 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 21:49:47,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506190434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:47,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:47,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:49:47,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336940615] [2021-06-05 21:49:47,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:49:47,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:49:47,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:49:47,526 INFO L87 Difference]: Start difference. First operand 111 states and 235 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:47,692 INFO L93 Difference]: Finished difference Result 157 states and 319 transitions. [2021-06-05 21:49:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:47,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:47,693 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:49:47,693 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:49:47,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:49:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:49:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-06-05 21:49:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 21:49:47,694 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-06-05 21:49:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:47,694 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 21:49:47,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 21:49:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:47,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:47,694 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:47,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-06-05 21:49:47,910 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1324439745, now seen corresponding path program 137 times [2021-06-05 21:49:47,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:47,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168378430] [2021-06-05 21:49:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:47,977 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 21:49:47,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:47,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168378430] [2021-06-05 21:49:47,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168378430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:47,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458420231] [2021-06-05 21:49:47,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:48,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:49:48,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 21:49:48,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:48,378 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 21:49:48,581 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:49:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:49:48,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:49:48,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:49:48,621 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:49:48,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 21:49:48,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:49:48,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:49:48,646 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-06-05 21:49:48,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-06-05 21:49:48,653 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:49:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 21:49:48,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:49:48,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:49:48,676 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-06-05 21:49:48,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:49:48,678 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:115, output treesize:50 [2021-06-05 21:49:48,731 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 21:49:48,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458420231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:48,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:48,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:49:48,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956364865] [2021-06-05 21:49:48,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:49:48,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:48,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:49:48,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:49:48,732 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:49,114 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 21:49:49,309 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 21:49:49,526 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 21:49:49,757 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 21:49:50,015 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 21:49:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:50,355 INFO L93 Difference]: Finished difference Result 205 states and 400 transitions. [2021-06-05 21:49:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:49:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:50,355 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:49:50,355 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:49:50,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1899.2ms TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:49:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:49:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 109. [2021-06-05 21:49:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.138888888888889) internal successors, (231), 108 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2021-06-05 21:49:50,357 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 17 [2021-06-05 21:49:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:50,357 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2021-06-05 21:49:50,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2021-06-05 21:49:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:49:50,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:50,358 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:50,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable781 [2021-06-05 21:49:50,573 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1767338885, now seen corresponding path program 138 times [2021-06-05 21:49:50,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:50,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566094402] [2021-06-05 21:49:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:50,638 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 21:49:50,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:50,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566094402] [2021-06-05 21:49:50,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566094402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:50,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536070147] [2021-06-05 21:49:50,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:50,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:49:50,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:50,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:49:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:50,773 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 21:49:50,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536070147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:50,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:50,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:49:50,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877751277] [2021-06-05 21:49:50,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:49:50,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:50,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:49:50,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:49:50,774 INFO L87 Difference]: Start difference. First operand 109 states and 231 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:51,053 INFO L93 Difference]: Finished difference Result 157 states and 318 transitions. [2021-06-05 21:49:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:51,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:49:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:51,053 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:49:51,053 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:49:51,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:49:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:49:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 104. [2021-06-05 21:49:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-06-05 21:49:51,055 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-06-05 21:49:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:51,055 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-06-05 21:49:51,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-06-05 21:49:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:49:51,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:51,055 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:51,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:51,255 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:51,256 INFO L82 PathProgramCache]: Analyzing trace with hash 316048736, now seen corresponding path program 139 times [2021-06-05 21:49:51,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:51,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078348512] [2021-06-05 21:49:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:51,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:51,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078348512] [2021-06-05 21:49:51,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078348512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:51,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547912931] [2021-06-05 21:49:51,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:49:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:51,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547912931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:51,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:51,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:49:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973230833] [2021-06-05 21:49:51,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:49:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:49:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:49:51,793 INFO L87 Difference]: Start difference. First operand 104 states and 218 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:52,272 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-06-05 21:49:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:49:52,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:49:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:52,273 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:49:52,273 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:49:52,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 763.3ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:49:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:49:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-06-05 21:49:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.1153846153846154) internal successors, (220), 104 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 220 transitions. [2021-06-05 21:49:52,274 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 220 transitions. Word has length 18 [2021-06-05 21:49:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:52,274 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 220 transitions. [2021-06-05 21:49:52,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 220 transitions. [2021-06-05 21:49:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:49:52,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:52,274 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:52,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-05 21:49:52,475 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:52,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:52,475 INFO L82 PathProgramCache]: Analyzing trace with hash -37090754, now seen corresponding path program 140 times [2021-06-05 21:49:52,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:52,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032152206] [2021-06-05 21:49:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:52,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032152206] [2021-06-05 21:49:52,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032152206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172073759] [2021-06-05 21:49:52,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:52,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:49:52,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:52,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:49:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:53,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172073759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:53,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:53,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:49:53,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071998207] [2021-06-05 21:49:53,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:49:53,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:49:53,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:49:53,210 INFO L87 Difference]: Start difference. First operand 105 states and 220 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:53,595 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-06-05 21:49:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:54,083 INFO L93 Difference]: Finished difference Result 166 states and 330 transitions. [2021-06-05 21:49:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:49:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:49:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:54,083 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:49:54,083 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:49:54,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1288.1ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:49:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:49:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-06-05 21:49:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1142857142857143) internal successors, (222), 105 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 222 transitions. [2021-06-05 21:49:54,085 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 222 transitions. Word has length 18 [2021-06-05 21:49:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:54,085 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 222 transitions. [2021-06-05 21:49:54,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 222 transitions. [2021-06-05 21:49:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:49:54,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:54,085 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:54,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:54,301 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1690044128, now seen corresponding path program 141 times [2021-06-05 21:49:54,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:54,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440402863] [2021-06-05 21:49:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:54,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:54,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440402863] [2021-06-05 21:49:54,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440402863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:54,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531635359] [2021-06-05 21:49:54,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:54,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:49:54,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:54,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:49:54,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:55,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531635359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:55,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:55,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:49:55,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432592720] [2021-06-05 21:49:55,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:49:55,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:55,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:49:55,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:49:55,044 INFO L87 Difference]: Start difference. First operand 106 states and 222 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:55,397 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 21:49:55,734 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-06-05 21:49:55,882 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-05 21:49:56,128 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-06-05 21:49:56,280 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-05 21:49:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:56,418 INFO L93 Difference]: Finished difference Result 187 states and 361 transitions. [2021-06-05 21:49:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:49:56,418 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:49:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:56,418 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:49:56,418 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:49:56,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1781.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:49:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:49:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 107. [2021-06-05 21:49:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 106 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-06-05 21:49:56,420 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 18 [2021-06-05 21:49:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:56,420 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-06-05 21:49:56,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-06-05 21:49:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:49:56,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:56,420 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:56,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:56,620 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1027581438, now seen corresponding path program 142 times [2021-06-05 21:49:56,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:56,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203626273] [2021-06-05 21:49:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:49:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:56,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:49:56,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203626273] [2021-06-05 21:49:56,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203626273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:56,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187466384] [2021-06-05 21:49:56,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:56,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:49:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:49:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:49:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:49:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:49:57,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187466384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:49:57,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:49:57,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:49:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617315172] [2021-06-05 21:49:57,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:49:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:49:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:49:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:49:57,425 INFO L87 Difference]: Start difference. First operand 107 states and 225 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:58,524 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-06-05 21:49:58,784 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2021-06-05 21:49:59,035 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 74 [2021-06-05 21:49:59,241 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 21:49:59,414 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2021-06-05 21:49:59,572 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-06-05 21:49:59,724 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2021-06-05 21:49:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:49:59,741 INFO L93 Difference]: Finished difference Result 207 states and 398 transitions. [2021-06-05 21:49:59,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:49:59,742 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:49:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:49:59,742 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:49:59,742 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:49:59,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2664.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:49:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:49:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 112. [2021-06-05 21:49:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-05 21:49:59,744 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 18 [2021-06-05 21:49:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:49:59,744 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-05 21:49:59,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:49:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-05 21:49:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:49:59,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:49:59,744 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:49:59,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:49:59,944 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:49:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:49:59,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2075337876, now seen corresponding path program 143 times [2021-06-05 21:49:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:49:59,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583447933] [2021-06-05 21:49:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:49:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:00,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583447933] [2021-06-05 21:50:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583447933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980461615] [2021-06-05 21:50:00,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:00,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:50:00,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:00,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980461615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:00,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:00,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:00,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041371185] [2021-06-05 21:50:00,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:00,529 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:01,114 INFO L93 Difference]: Finished difference Result 137 states and 274 transitions. [2021-06-05 21:50:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:50:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:01,115 INFO L225 Difference]: With dead ends: 137 [2021-06-05 21:50:01,115 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 21:50:01,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:50:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 21:50:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-06-05 21:50:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 21:50:01,116 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 18 [2021-06-05 21:50:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:01,116 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 21:50:01,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 21:50:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:01,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:01,116 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:01,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 21:50:01,332 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash 422384502, now seen corresponding path program 144 times [2021-06-05 21:50:01,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:01,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392813889] [2021-06-05 21:50:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:01,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:01,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392813889] [2021-06-05 21:50:01,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392813889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:01,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305509439] [2021-06-05 21:50:01,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:01,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:50:01,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:01,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:01,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:02,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305509439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:02,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:02,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:02,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124480623] [2021-06-05 21:50:02,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:02,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:02,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:02,011 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:02,702 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-06-05 21:50:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:50:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:02,703 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:50:02,703 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:50:02,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1029.3ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:50:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:50:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-06-05 21:50:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-06-05 21:50:02,704 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 18 [2021-06-05 21:50:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:02,704 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-06-05 21:50:02,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-06-05 21:50:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:02,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:02,705 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:02,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 21:50:02,905 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1154957228, now seen corresponding path program 145 times [2021-06-05 21:50:02,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:02,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745256145] [2021-06-05 21:50:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:03,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:03,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745256145] [2021-06-05 21:50:03,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745256145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:03,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577710467] [2021-06-05 21:50:03,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:03,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577710467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:03,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:03,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076017009] [2021-06-05 21:50:03,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:03,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:03,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:03,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:03,535 INFO L87 Difference]: Start difference. First operand 114 states and 240 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:04,398 INFO L93 Difference]: Finished difference Result 148 states and 296 transitions. [2021-06-05 21:50:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:04,398 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:50:04,398 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 21:50:04,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1091.8ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:50:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 21:50:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-06-05 21:50:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1315789473684212) internal successors, (243), 114 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 243 transitions. [2021-06-05 21:50:04,400 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 243 transitions. Word has length 18 [2021-06-05 21:50:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:04,400 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 243 transitions. [2021-06-05 21:50:04,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 243 transitions. [2021-06-05 21:50:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:04,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:04,400 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:04,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 21:50:04,601 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash 179634102, now seen corresponding path program 146 times [2021-06-05 21:50:04,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:04,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705206020] [2021-06-05 21:50:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:04,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705206020] [2021-06-05 21:50:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705206020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668742909] [2021-06-05 21:50:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:04,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:04,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:04,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:05,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668742909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:05,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:05,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:05,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403684708] [2021-06-05 21:50:05,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:05,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:05,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:05,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:05,192 INFO L87 Difference]: Start difference. First operand 115 states and 243 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:05,845 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-06-05 21:50:06,051 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-06-05 21:50:06,335 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 21:50:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:07,060 INFO L93 Difference]: Finished difference Result 249 states and 458 transitions. [2021-06-05 21:50:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:50:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:07,061 INFO L225 Difference]: With dead ends: 249 [2021-06-05 21:50:07,061 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 21:50:07,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2020.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:50:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 21:50:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2021-06-05 21:50:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 21:50:07,063 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 18 [2021-06-05 21:50:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:07,063 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 21:50:07,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 21:50:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:07,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:07,063 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:07,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-06-05 21:50:07,264 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:07,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1060750436, now seen corresponding path program 147 times [2021-06-05 21:50:07,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:07,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475412640] [2021-06-05 21:50:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:07,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:07,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475412640] [2021-06-05 21:50:07,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475412640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:07,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272731032] [2021-06-05 21:50:07,462 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 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 21:50:07,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:50:07,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:07,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272731032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:07,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:07,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:07,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324783125] [2021-06-05 21:50:07,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:07,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:07,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:07,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:07,851 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:08,193 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2021-06-05 21:50:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:50:08,193 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:08,194 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:50:08,194 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 21:50:08,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 654.8ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:50:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 21:50:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2021-06-05 21:50:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.178861788617886) internal successors, (268), 123 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 268 transitions. [2021-06-05 21:50:08,195 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 268 transitions. Word has length 18 [2021-06-05 21:50:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:08,195 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 268 transitions. [2021-06-05 21:50:08,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 268 transitions. [2021-06-05 21:50:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:08,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:08,195 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:08,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable888,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:08,396 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1656875130, now seen corresponding path program 148 times [2021-06-05 21:50:08,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:08,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020280702] [2021-06-05 21:50:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:08,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:08,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020280702] [2021-06-05 21:50:08,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020280702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:08,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646105307] [2021-06-05 21:50:08,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:08,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:08,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646105307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:08,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:08,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:08,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882019060] [2021-06-05 21:50:08,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:08,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:08,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:08,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:08,965 INFO L87 Difference]: Start difference. First operand 124 states and 268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:09,675 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-06-05 21:50:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:50:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:09,676 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:50:09,676 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:50:09,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:50:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:50:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-06-05 21:50:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-06-05 21:50:09,677 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 18 [2021-06-05 21:50:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:09,677 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-06-05 21:50:09,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-06-05 21:50:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:09,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:09,678 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:09,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable899 [2021-06-05 21:50:09,878 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1303500836, now seen corresponding path program 149 times [2021-06-05 21:50:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:09,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218391538] [2021-06-05 21:50:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:10,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218391538] [2021-06-05 21:50:10,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218391538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022320463] [2021-06-05 21:50:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:10,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:50:10,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:10,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:10,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022320463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:10,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:10,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:10,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75888569] [2021-06-05 21:50:10,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:10,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:10,397 INFO L87 Difference]: Start difference. First operand 125 states and 270 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:11,270 INFO L93 Difference]: Finished difference Result 224 states and 435 transitions. [2021-06-05 21:50:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:50:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:11,271 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:50:11,271 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 21:50:11,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1041.9ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:50:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 21:50:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 128. [2021-06-05 21:50:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.173228346456693) internal successors, (276), 127 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 276 transitions. [2021-06-05 21:50:11,273 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 276 transitions. Word has length 18 [2021-06-05 21:50:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:11,273 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 276 transitions. [2021-06-05 21:50:11,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 276 transitions. [2021-06-05 21:50:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:11,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:11,273 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:11,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 21:50:11,473 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2131745900, now seen corresponding path program 150 times [2021-06-05 21:50:11,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:11,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514143325] [2021-06-05 21:50:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:11,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514143325] [2021-06-05 21:50:11,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514143325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310189979] [2021-06-05 21:50:11,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:11,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:50:11,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:11,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:50:11,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:12,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310189979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:12,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:12,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460335629] [2021-06-05 21:50:12,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:12,036 INFO L87 Difference]: Start difference. First operand 128 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:13,134 INFO L93 Difference]: Finished difference Result 225 states and 449 transitions. [2021-06-05 21:50:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:50:13,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:13,135 INFO L225 Difference]: With dead ends: 225 [2021-06-05 21:50:13,135 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:50:13,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1263.9ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:50:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:50:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 135. [2021-06-05 21:50:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1940298507462686) internal successors, (294), 134 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 294 transitions. [2021-06-05 21:50:13,136 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 294 transitions. Word has length 18 [2021-06-05 21:50:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:13,136 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 294 transitions. [2021-06-05 21:50:13,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 294 transitions. [2021-06-05 21:50:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:13,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:13,137 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:13,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:13,347 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash -797154570, now seen corresponding path program 151 times [2021-06-05 21:50:13,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:13,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60155270] [2021-06-05 21:50:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:13,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:13,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60155270] [2021-06-05 21:50:13,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60155270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:13,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569184284] [2021-06-05 21:50:13,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:13,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569184284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:13,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:13,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:13,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691346367] [2021-06-05 21:50:13,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:13,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:13,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:13,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:13,846 INFO L87 Difference]: Start difference. First operand 135 states and 294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:14,317 INFO L93 Difference]: Finished difference Result 198 states and 397 transitions. [2021-06-05 21:50:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:14,318 INFO L225 Difference]: With dead ends: 198 [2021-06-05 21:50:14,318 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:50:14,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 639.9ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:50:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:50:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-06-05 21:50:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.2058823529411766) internal successors, (300), 136 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 300 transitions. [2021-06-05 21:50:14,319 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 300 transitions. Word has length 18 [2021-06-05 21:50:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:14,319 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 300 transitions. [2021-06-05 21:50:14,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 300 transitions. [2021-06-05 21:50:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:14,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:14,320 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:14,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-06-05 21:50:14,525 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1335010148, now seen corresponding path program 152 times [2021-06-05 21:50:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:14,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219725899] [2021-06-05 21:50:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:14,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:14,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219725899] [2021-06-05 21:50:14,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219725899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:14,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108680609] [2021-06-05 21:50:14,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:14,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:14,977 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:15,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108680609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:15,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:15,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:15,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844833153] [2021-06-05 21:50:15,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:15,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:15,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:15,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:15,112 INFO L87 Difference]: Start difference. First operand 137 states and 300 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:15,513 INFO L93 Difference]: Finished difference Result 206 states and 421 transitions. [2021-06-05 21:50:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:15,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:15,514 INFO L225 Difference]: With dead ends: 206 [2021-06-05 21:50:15,514 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:50:15,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:50:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:50:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2021-06-05 21:50:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.210144927536232) internal successors, (305), 138 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 305 transitions. [2021-06-05 21:50:15,516 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 305 transitions. Word has length 18 [2021-06-05 21:50:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:15,516 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 305 transitions. [2021-06-05 21:50:15,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 305 transitions. [2021-06-05 21:50:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:15,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:15,516 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:15,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:15,716 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1158851330, now seen corresponding path program 153 times [2021-06-05 21:50:15,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:15,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822416715] [2021-06-05 21:50:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:16,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:16,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822416715] [2021-06-05 21:50:16,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822416715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:16,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791107861] [2021-06-05 21:50:16,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:16,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:50:16,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:16,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:16,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791107861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:16,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:16,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:16,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868753347] [2021-06-05 21:50:16,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:16,387 INFO L87 Difference]: Start difference. First operand 139 states and 305 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:16,945 INFO L93 Difference]: Finished difference Result 172 states and 355 transitions. [2021-06-05 21:50:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:50:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:16,946 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:50:16,946 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:50:16,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:50:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:50:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2021-06-05 21:50:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-06-05 21:50:16,947 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 18 [2021-06-05 21:50:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:16,947 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-06-05 21:50:16,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-06-05 21:50:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:16,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:16,948 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:17,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-06-05 21:50:17,161 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1483162592, now seen corresponding path program 154 times [2021-06-05 21:50:17,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:17,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050913840] [2021-06-05 21:50:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:17,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050913840] [2021-06-05 21:50:17,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050913840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751021198] [2021-06-05 21:50:17,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:17,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:17,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:17,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:17,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751021198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:17,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:17,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959782309] [2021-06-05 21:50:17,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:17,764 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:18,584 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-06-05 21:50:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:50:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:18,585 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:50:18,585 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:50:18,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1081.6ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:50:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:50:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2021-06-05 21:50:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-06-05 21:50:18,586 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 18 [2021-06-05 21:50:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:18,587 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-06-05 21:50:18,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-06-05 21:50:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:18,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:18,587 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:18,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable973 [2021-06-05 21:50:18,787 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash -94179138, now seen corresponding path program 155 times [2021-06-05 21:50:18,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:18,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563998786] [2021-06-05 21:50:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:19,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:19,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563998786] [2021-06-05 21:50:19,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563998786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:19,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982186473] [2021-06-05 21:50:19,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:19,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:50:19,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:19,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:19,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982186473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:19,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:19,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:19,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138959109] [2021-06-05 21:50:19,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:19,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:19,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:19,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:19,472 INFO L87 Difference]: Start difference. First operand 143 states and 314 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:20,432 INFO L93 Difference]: Finished difference Result 193 states and 393 transitions. [2021-06-05 21:50:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:50:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:20,445 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:50:20,445 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:50:20,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1251.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:50:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:50:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2021-06-05 21:50:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2183098591549295) internal successors, (315), 142 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 315 transitions. [2021-06-05 21:50:20,446 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 315 transitions. Word has length 18 [2021-06-05 21:50:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:20,447 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 315 transitions. [2021-06-05 21:50:20,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 315 transitions. [2021-06-05 21:50:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:20,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:20,448 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:20,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:20,665 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash -242722746, now seen corresponding path program 156 times [2021-06-05 21:50:20,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:20,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719996025] [2021-06-05 21:50:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:20,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:20,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719996025] [2021-06-05 21:50:20,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719996025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:20,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14195371] [2021-06-05 21:50:20,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:20,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:50:20,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:20,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:20,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:21,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14195371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:21,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:21,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:21,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376238468] [2021-06-05 21:50:21,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:21,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:21,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:21,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:21,203 INFO L87 Difference]: Start difference. First operand 143 states and 315 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:21,990 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2021-06-05 21:50:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:50:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:21,991 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:50:21,991 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:50:21,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:50:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:50:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 141. [2021-06-05 21:50:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2214285714285715) internal successors, (311), 140 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 311 transitions. [2021-06-05 21:50:21,993 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 311 transitions. Word has length 18 [2021-06-05 21:50:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:21,993 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 311 transitions. [2021-06-05 21:50:21,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 311 transitions. [2021-06-05 21:50:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:21,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:21,993 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:22,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 21:50:22,209 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash -863772573, now seen corresponding path program 157 times [2021-06-05 21:50:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137914936] [2021-06-05 21:50:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:22,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:22,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137914936] [2021-06-05 21:50:22,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137914936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930979129] [2021-06-05 21:50:22,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:50:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:22,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930979129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:22,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:22,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:50:22,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44421672] [2021-06-05 21:50:22,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:50:22,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:50:22,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:22,433 INFO L87 Difference]: Start difference. First operand 141 states and 311 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:22,571 INFO L93 Difference]: Finished difference Result 164 states and 354 transitions. [2021-06-05 21:50:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:50:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:22,571 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:50:22,571 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 21:50:22,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 21:50:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2021-06-05 21:50:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2142857142857144) internal successors, (310), 140 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 310 transitions. [2021-06-05 21:50:22,573 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 310 transitions. Word has length 18 [2021-06-05 21:50:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:22,573 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 310 transitions. [2021-06-05 21:50:22,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 310 transitions. [2021-06-05 21:50:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:22,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:22,573 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:22,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:22,774 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:22,774 INFO L82 PathProgramCache]: Analyzing trace with hash 263623520, now seen corresponding path program 158 times [2021-06-05 21:50:22,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:22,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711338112] [2021-06-05 21:50:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:22,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711338112] [2021-06-05 21:50:22,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711338112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862983529] [2021-06-05 21:50:22,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:22,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:22,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:22,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:23,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862983529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:23,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:23,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:23,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139820779] [2021-06-05 21:50:23,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:23,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:23,290 INFO L87 Difference]: Start difference. First operand 141 states and 310 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:23,860 INFO L93 Difference]: Finished difference Result 205 states and 413 transitions. [2021-06-05 21:50:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:50:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:23,861 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:50:23,861 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:50:23,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 696.5ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:50:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:50:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 137. [2021-06-05 21:50:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-06-05 21:50:23,863 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 18 [2021-06-05 21:50:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:23,863 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-06-05 21:50:23,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-06-05 21:50:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:23,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:23,863 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:24,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 21:50:24,063 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -274232058, now seen corresponding path program 159 times [2021-06-05 21:50:24,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:24,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192205502] [2021-06-05 21:50:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:24,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:24,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192205502] [2021-06-05 21:50:24,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192205502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:24,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34811127] [2021-06-05 21:50:24,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:24,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:50:24,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:24,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:50:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:24,531 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:24,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34811127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:24,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:24,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:24,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838632605] [2021-06-05 21:50:24,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:24,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:24,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:24,664 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:25,240 INFO L93 Difference]: Finished difference Result 209 states and 427 transitions. [2021-06-05 21:50:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:50:25,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:25,241 INFO L225 Difference]: With dead ends: 209 [2021-06-05 21:50:25,241 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:50:25,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:50:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:50:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 135. [2021-06-05 21:50:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.201492537313433) internal successors, (295), 134 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 295 transitions. [2021-06-05 21:50:25,243 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 295 transitions. Word has length 18 [2021-06-05 21:50:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:25,243 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 295 transitions. [2021-06-05 21:50:25,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 295 transitions. [2021-06-05 21:50:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:25,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:25,243 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:25,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:25,444 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1267484832, now seen corresponding path program 160 times [2021-06-05 21:50:25,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:25,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568804002] [2021-06-05 21:50:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:25,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:25,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568804002] [2021-06-05 21:50:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568804002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:25,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184673444] [2021-06-05 21:50:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:25,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:25,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184673444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:26,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:26,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:26,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277025181] [2021-06-05 21:50:26,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:26,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:26,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:26,031 INFO L87 Difference]: Start difference. First operand 135 states and 295 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:26,456 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-06-05 21:50:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:50:26,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:26,457 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:50:26,457 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:50:26,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 704.4ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:50:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:50:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-06-05 21:50:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.204379562043796) internal successors, (302), 137 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2021-06-05 21:50:26,458 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 18 [2021-06-05 21:50:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:26,458 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2021-06-05 21:50:26,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2021-06-05 21:50:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:26,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:26,459 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:26,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:26,659 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:26,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:26,659 INFO L82 PathProgramCache]: Analyzing trace with hash -309856898, now seen corresponding path program 161 times [2021-06-05 21:50:26,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:26,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95105292] [2021-06-05 21:50:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:26,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:26,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95105292] [2021-06-05 21:50:26,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95105292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:26,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952048325] [2021-06-05 21:50:26,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:26,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:50:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:26,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:26,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:27,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952048325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:27,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:27,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:27,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129737246] [2021-06-05 21:50:27,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:27,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:27,273 INFO L87 Difference]: Start difference. First operand 138 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:28,451 INFO L93 Difference]: Finished difference Result 214 states and 430 transitions. [2021-06-05 21:50:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:50:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:28,451 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:50:28,451 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:50:28,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1407.8ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:50:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:50:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2021-06-05 21:50:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2253521126760565) internal successors, (316), 142 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 316 transitions. [2021-06-05 21:50:28,453 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 316 transitions. Word has length 18 [2021-06-05 21:50:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:28,453 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 316 transitions. [2021-06-05 21:50:28,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 316 transitions. [2021-06-05 21:50:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:28,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:28,453 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:28,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:28,661 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash 196489368, now seen corresponding path program 162 times [2021-06-05 21:50:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:28,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380046361] [2021-06-05 21:50:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:28,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:28,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380046361] [2021-06-05 21:50:28,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380046361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:28,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673512410] [2021-06-05 21:50:28,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:28,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:50:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673512410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:29,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:29,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:29,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377742827] [2021-06-05 21:50:29,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:29,207 INFO L87 Difference]: Start difference. First operand 143 states and 316 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:29,950 INFO L93 Difference]: Finished difference Result 203 states and 416 transitions. [2021-06-05 21:50:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:50:29,950 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:29,951 INFO L225 Difference]: With dead ends: 203 [2021-06-05 21:50:29,951 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:50:29,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 945.0ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:50:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:50:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2021-06-05 21:50:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-06-05 21:50:29,952 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-06-05 21:50:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:29,952 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-06-05 21:50:29,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-06-05 21:50:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:29,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:29,953 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:30,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:30,153 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash 993225120, now seen corresponding path program 163 times [2021-06-05 21:50:30,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:30,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302163533] [2021-06-05 21:50:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302163533] [2021-06-05 21:50:30,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302163533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234856569] [2021-06-05 21:50:30,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:30,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234856569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:30,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390687209] [2021-06-05 21:50:30,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:30,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:30,595 INFO L87 Difference]: Start difference. First operand 144 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:31,093 INFO L93 Difference]: Finished difference Result 212 states and 438 transitions. [2021-06-05 21:50:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:31,094 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:50:31,094 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:50:31,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:50:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:50:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2021-06-05 21:50:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-06-05 21:50:31,096 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-06-05 21:50:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:31,096 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-06-05 21:50:31,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-06-05 21:50:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:31,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:31,096 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:31,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1075 [2021-06-05 21:50:31,296 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645570, now seen corresponding path program 164 times [2021-06-05 21:50:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:31,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791142572] [2021-06-05 21:50:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:31,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:31,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791142572] [2021-06-05 21:50:31,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791142572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:31,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075631490] [2021-06-05 21:50:31,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:31,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:31,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:31,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:31,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075631490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:31,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:31,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389995416] [2021-06-05 21:50:31,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:31,884 INFO L87 Difference]: Start difference. First operand 144 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:32,385 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-06-05 21:50:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:32,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:32,386 INFO L225 Difference]: With dead ends: 190 [2021-06-05 21:50:32,386 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:50:32,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 778.3ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:50:32,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:50:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2021-06-05 21:50:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-06-05 21:50:32,388 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-06-05 21:50:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:32,388 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-06-05 21:50:32,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-06-05 21:50:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:32,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:32,388 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:32,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:32,588 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash -489909818, now seen corresponding path program 165 times [2021-06-05 21:50:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:32,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681582319] [2021-06-05 21:50:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:32,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:32,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681582319] [2021-06-05 21:50:32,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681582319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:32,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592547341] [2021-06-05 21:50:32,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:32,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:50:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:32,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:32,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:33,001 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:33,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592547341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:33,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:33,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:33,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722588531] [2021-06-05 21:50:33,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:33,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:33,138 INFO L87 Difference]: Start difference. First operand 146 states and 322 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:33,852 INFO L93 Difference]: Finished difference Result 217 states and 437 transitions. [2021-06-05 21:50:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:33,853 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:50:33,853 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 21:50:33,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 975.8ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:50:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 21:50:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2021-06-05 21:50:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.22972972972973) internal successors, (330), 148 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 330 transitions. [2021-06-05 21:50:33,854 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 330 transitions. Word has length 18 [2021-06-05 21:50:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:33,855 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 330 transitions. [2021-06-05 21:50:33,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 330 transitions. [2021-06-05 21:50:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:33,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:33,855 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:34,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:34,065 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 16436448, now seen corresponding path program 166 times [2021-06-05 21:50:34,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:34,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42848255] [2021-06-05 21:50:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:34,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42848255] [2021-06-05 21:50:34,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42848255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000157371] [2021-06-05 21:50:34,251 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 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 21:50:34,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:34,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:34,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:34,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:34,504 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:34,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000157371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:34,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:34,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:34,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596228930] [2021-06-05 21:50:34,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:34,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:34,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:34,695 INFO L87 Difference]: Start difference. First operand 149 states and 330 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:35,142 INFO L93 Difference]: Finished difference Result 219 states and 454 transitions. [2021-06-05 21:50:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:35,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:35,143 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:50:35,143 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:50:35,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:50:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:50:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-06-05 21:50:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2348993288590604) internal successors, (333), 149 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 333 transitions. [2021-06-05 21:50:35,145 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 333 transitions. Word has length 18 [2021-06-05 21:50:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:35,145 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 333 transitions. [2021-06-05 21:50:35,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 333 transitions. [2021-06-05 21:50:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:35,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:35,145 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:35,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-06-05 21:50:35,346 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:35,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1660498388, now seen corresponding path program 167 times [2021-06-05 21:50:35,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:35,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008378322] [2021-06-05 21:50:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:35,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:35,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008378322] [2021-06-05 21:50:35,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008378322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:35,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683872572] [2021-06-05 21:50:35,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:35,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:50:35,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:35,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683872572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:35,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:35,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976199340] [2021-06-05 21:50:35,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:35,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:35,887 INFO L87 Difference]: Start difference. First operand 150 states and 333 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:36,366 INFO L93 Difference]: Finished difference Result 170 states and 363 transitions. [2021-06-05 21:50:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:36,367 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:50:36,367 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 21:50:36,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:50:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 21:50:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-06-05 21:50:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-06-05 21:50:36,368 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-06-05 21:50:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:36,368 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-06-05 21:50:36,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-06-05 21:50:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:36,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:36,369 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:36,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:36,581 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash 7545014, now seen corresponding path program 168 times [2021-06-05 21:50:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:36,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570264748] [2021-06-05 21:50:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:36,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:36,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570264748] [2021-06-05 21:50:36,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570264748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:36,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713016381] [2021-06-05 21:50:36,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:36,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:50:36,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:37,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713016381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:37,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:37,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149120307] [2021-06-05 21:50:37,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:37,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:37,211 INFO L87 Difference]: Start difference. First operand 152 states and 337 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:37,721 INFO L93 Difference]: Finished difference Result 169 states and 362 transitions. [2021-06-05 21:50:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:37,722 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:50:37,722 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:50:37,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:50:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:50:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-06-05 21:50:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2302631578947367) internal successors, (339), 152 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 339 transitions. [2021-06-05 21:50:37,723 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 339 transitions. Word has length 18 [2021-06-05 21:50:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:37,723 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 339 transitions. [2021-06-05 21:50:37,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2021-06-05 21:50:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:37,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:37,723 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:37,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:37,924 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1569796716, now seen corresponding path program 169 times [2021-06-05 21:50:37,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:37,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77415908] [2021-06-05 21:50:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:38,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:38,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77415908] [2021-06-05 21:50:38,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77415908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:38,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973587433] [2021-06-05 21:50:38,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:38,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973587433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:38,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:38,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:50:38,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802972858] [2021-06-05 21:50:38,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:50:38,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:50:38,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:50:38,573 INFO L87 Difference]: Start difference. First operand 153 states and 339 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:39,523 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 21:50:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:39,999 INFO L93 Difference]: Finished difference Result 226 states and 453 transitions. [2021-06-05 21:50:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:50:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:40,000 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:50:40,000 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 21:50:40,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1730.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:50:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 21:50:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2021-06-05 21:50:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-06-05 21:50:40,001 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-06-05 21:50:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:40,002 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-06-05 21:50:40,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-06-05 21:50:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:40,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:40,002 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:40,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:40,202 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1475589924, now seen corresponding path program 170 times [2021-06-05 21:50:40,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:40,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877595505] [2021-06-05 21:50:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:40,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:40,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877595505] [2021-06-05 21:50:40,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877595505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:40,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247830045] [2021-06-05 21:50:40,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:40,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:40,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:40,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247830045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:40,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:40,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:40,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971357385] [2021-06-05 21:50:40,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:40,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:40,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:40,784 INFO L87 Difference]: Start difference. First operand 152 states and 337 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:41,097 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-06-05 21:50:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:41,097 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:50:41,097 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:50:41,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:50:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:50:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-06-05 21:50:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2287581699346406) internal successors, (341), 153 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-06-05 21:50:41,099 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 18 [2021-06-05 21:50:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:41,099 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-06-05 21:50:41,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-06-05 21:50:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:41,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:41,099 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:41,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:41,300 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:41,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1242035642, now seen corresponding path program 171 times [2021-06-05 21:50:41,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:41,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47470739] [2021-06-05 21:50:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:41,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47470739] [2021-06-05 21:50:41,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47470739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:41,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060774322] [2021-06-05 21:50:41,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:41,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:50:41,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:41,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060774322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:41,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:41,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:41,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537267816] [2021-06-05 21:50:41,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:41,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:41,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:41,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:41,890 INFO L87 Difference]: Start difference. First operand 154 states and 341 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:42,778 INFO L93 Difference]: Finished difference Result 202 states and 418 transitions. [2021-06-05 21:50:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:50:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:42,778 INFO L225 Difference]: With dead ends: 202 [2021-06-05 21:50:42,778 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:50:42,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1117.3ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:50:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:50:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-06-05 21:50:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-06-05 21:50:42,780 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-06-05 21:50:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:42,780 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-06-05 21:50:42,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-06-05 21:50:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:42,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:42,780 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:42,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:42,981 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1955577145, now seen corresponding path program 172 times [2021-06-05 21:50:42,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:42,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968750531] [2021-06-05 21:50:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:43,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968750531] [2021-06-05 21:50:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968750531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474624422] [2021-06-05 21:50:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:43,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:43,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:50:43,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:43,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474624422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:43,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:43,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:50:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537769373] [2021-06-05 21:50:43,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:50:43,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:43,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:50:43,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:43,198 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:43,492 INFO L93 Difference]: Finished difference Result 186 states and 405 transitions. [2021-06-05 21:50:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:50:43,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:43,493 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:50:43,493 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:50:43,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:50:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:50:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-06-05 21:50:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-06-05 21:50:43,495 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-06-05 21:50:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:43,495 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-06-05 21:50:43,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-06-05 21:50:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:43,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:43,495 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:43,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 21:50:43,695 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:43,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1748381908, now seen corresponding path program 173 times [2021-06-05 21:50:43,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:43,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754535869] [2021-06-05 21:50:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:43,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754535869] [2021-06-05 21:50:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754535869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556864408] [2021-06-05 21:50:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:43,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:50:43,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:43,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:44,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556864408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:44,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:44,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:44,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922559163] [2021-06-05 21:50:44,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:44,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:44,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:44,204 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:44,789 INFO L93 Difference]: Finished difference Result 212 states and 446 transitions. [2021-06-05 21:50:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:44,790 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:50:44,790 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 21:50:44,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 784.4ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:50:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 21:50:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 157. [2021-06-05 21:50:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.230769230769231) internal successors, (348), 156 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 348 transitions. [2021-06-05 21:50:44,791 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 348 transitions. Word has length 18 [2021-06-05 21:50:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:44,791 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 348 transitions. [2021-06-05 21:50:44,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 348 transitions. [2021-06-05 21:50:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:44,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:44,792 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:44,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:44,992 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1211994058, now seen corresponding path program 174 times [2021-06-05 21:50:44,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:44,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37426158] [2021-06-05 21:50:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:45,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37426158] [2021-06-05 21:50:45,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37426158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774613084] [2021-06-05 21:50:45,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:50:45,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:50:45,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 21:50:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774613084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:45,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:45,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545838437] [2021-06-05 21:50:45,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:45,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:45,447 INFO L87 Difference]: Start difference. First operand 157 states and 348 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:46,133 INFO L93 Difference]: Finished difference Result 221 states and 456 transitions. [2021-06-05 21:50:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:50:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:46,133 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:50:46,133 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:50:46,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:50:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:50:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2021-06-05 21:50:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-06-05 21:50:46,135 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-06-05 21:50:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:46,135 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-06-05 21:50:46,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-06-05 21:50:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:46,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:46,135 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:46,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:46,336 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1749849636, now seen corresponding path program 175 times [2021-06-05 21:50:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:46,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907376829] [2021-06-05 21:50:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:46,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:46,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907376829] [2021-06-05 21:50:46,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907376829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989135920] [2021-06-05 21:50:46,486 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 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 21:50:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:46,754 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:46,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989135920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:46,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:46,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:46,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547441945] [2021-06-05 21:50:46,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:46,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:46,892 INFO L87 Difference]: Start difference. First operand 159 states and 353 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:47,358 INFO L93 Difference]: Finished difference Result 222 states and 464 transitions. [2021-06-05 21:50:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:50:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:47,358 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:50:47,358 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:50:47,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:50:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:50:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-06-05 21:50:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-06-05 21:50:47,360 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-06-05 21:50:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:47,360 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-06-05 21:50:47,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-06-05 21:50:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:47,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:47,361 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:47,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-06-05 21:50:47,561 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:47,561 INFO L82 PathProgramCache]: Analyzing trace with hash -208132746, now seen corresponding path program 176 times [2021-06-05 21:50:47,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:47,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881645242] [2021-06-05 21:50:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:47,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881645242] [2021-06-05 21:50:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881645242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897822121] [2021-06-05 21:50:47,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:47,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897822121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:48,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:48,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:48,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268085268] [2021-06-05 21:50:48,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:48,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:48,147 INFO L87 Difference]: Start difference. First operand 159 states and 353 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:48,429 INFO L93 Difference]: Finished difference Result 177 states and 380 transitions. [2021-06-05 21:50:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:48,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:48,429 INFO L225 Difference]: With dead ends: 177 [2021-06-05 21:50:48,429 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 21:50:48,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 624.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:50:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 21:50:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2021-06-05 21:50:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-06-05 21:50:48,431 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-06-05 21:50:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:48,431 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-06-05 21:50:48,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-06-05 21:50:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:48,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:48,431 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:48,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:48,632 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1785474476, now seen corresponding path program 177 times [2021-06-05 21:50:48,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:48,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884646616] [2021-06-05 21:50:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:48,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:48,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884646616] [2021-06-05 21:50:48,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884646616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:48,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782842497] [2021-06-05 21:50:48,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:48,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:50:48,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:50:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782842497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:49,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:49,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:49,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481444691] [2021-06-05 21:50:49,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:49,246 INFO L87 Difference]: Start difference. First operand 161 states and 357 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:49,956 INFO L93 Difference]: Finished difference Result 216 states and 440 transitions. [2021-06-05 21:50:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:50:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:49,957 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:50:49,957 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:50:49,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 994.7ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:50:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:50:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2021-06-05 21:50:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-06-05 21:50:49,959 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-06-05 21:50:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:49,959 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-06-05 21:50:49,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-06-05 21:50:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:49,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:49,959 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:50,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-05 21:50:50,159 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1279128210, now seen corresponding path program 178 times [2021-06-05 21:50:50,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:50,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58128697] [2021-06-05 21:50:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:50,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:50,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58128697] [2021-06-05 21:50:50,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58128697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:50,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689921251] [2021-06-05 21:50:50,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:50,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:50,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:50,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:50,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689921251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:50,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:50,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:50,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72849142] [2021-06-05 21:50:50,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:50,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:50,736 INFO L87 Difference]: Start difference. First operand 160 states and 355 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:51,656 INFO L93 Difference]: Finished difference Result 228 states and 475 transitions. [2021-06-05 21:50:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:51,657 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:50:51,657 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 21:50:51,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1187.5ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:50:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 21:50:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-06-05 21:50:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2439024390243905) internal successors, (368), 164 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 368 transitions. [2021-06-05 21:50:51,658 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 368 transitions. Word has length 18 [2021-06-05 21:50:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:51,658 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 368 transitions. [2021-06-05 21:50:51,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 368 transitions. [2021-06-05 21:50:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:51,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:51,659 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:51,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:51,873 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash 55463120, now seen corresponding path program 179 times [2021-06-05 21:50:51,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:51,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019195925] [2021-06-05 21:50:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:52,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:52,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019195925] [2021-06-05 21:50:52,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019195925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:52,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474583461] [2021-06-05 21:50:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:52,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:50:52,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:52,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:52,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:52,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474583461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:52,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:52,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:52,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423403386] [2021-06-05 21:50:52,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:52,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:52,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:52,373 INFO L87 Difference]: Start difference. First operand 165 states and 368 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:53,091 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-06-05 21:50:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:53,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:53,092 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:50:53,092 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:50:53,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 894.1ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:50:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:50:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 161. [2021-06-05 21:50:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-06-05 21:50:53,094 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-06-05 21:50:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:53,094 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-06-05 21:50:53,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-06-05 21:50:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:53,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:53,094 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:53,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:53,302 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash -482392458, now seen corresponding path program 180 times [2021-06-05 21:50:53,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:53,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35939343] [2021-06-05 21:50:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:53,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:53,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35939343] [2021-06-05 21:50:53,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35939343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:53,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706238439] [2021-06-05 21:50:53,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:53,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:50:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:53,751 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:53,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706238439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:53,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:53,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:53,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136161591] [2021-06-05 21:50:53,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:53,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:53,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:53,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:53,882 INFO L87 Difference]: Start difference. First operand 161 states and 357 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:54,319 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-06-05 21:50:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:50:54,319 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:54,320 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:50:54,320 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:50:54,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:50:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:50:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2021-06-05 21:50:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-06-05 21:50:54,321 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-06-05 21:50:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:54,322 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-06-05 21:50:54,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-06-05 21:50:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:54,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:54,322 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:54,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:54,522 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:54,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1532704148, now seen corresponding path program 181 times [2021-06-05 21:50:54,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:54,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308044319] [2021-06-05 21:50:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:54,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:54,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308044319] [2021-06-05 21:50:54,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308044319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:54,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256030479] [2021-06-05 21:50:54,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:55,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256030479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:55,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:55,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609106078] [2021-06-05 21:50:55,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:55,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:55,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:55,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:55,094 INFO L87 Difference]: Start difference. First operand 160 states and 355 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:55,846 INFO L93 Difference]: Finished difference Result 218 states and 444 transitions. [2021-06-05 21:50:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:50:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:55,847 INFO L225 Difference]: With dead ends: 218 [2021-06-05 21:50:55,847 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:50:55,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 968.7ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:50:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:50:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-06-05 21:50:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2375) internal successors, (358), 160 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 358 transitions. [2021-06-05 21:50:55,848 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 358 transitions. Word has length 18 [2021-06-05 21:50:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:55,849 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 358 transitions. [2021-06-05 21:50:55,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 358 transitions. [2021-06-05 21:50:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:55,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:55,849 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:56,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:56,049 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2078756465, now seen corresponding path program 182 times [2021-06-05 21:50:56,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:56,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943255472] [2021-06-05 21:50:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:56,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:56,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943255472] [2021-06-05 21:50:56,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943255472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:56,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606295731] [2021-06-05 21:50:56,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:56,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:56,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:50:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606295731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:50:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645235903] [2021-06-05 21:50:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:50:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:50:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:56,343 INFO L87 Difference]: Start difference. First operand 161 states and 358 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:56,448 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2021-06-05 21:50:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:56,448 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:50:56,448 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 21:50:56,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:50:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 21:50:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-06-05 21:50:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-05 21:50:56,450 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-05 21:50:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:56,450 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-05 21:50:56,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-05 21:50:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:56,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:56,450 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:56,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:56,651 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:56,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1965527396, now seen corresponding path program 183 times [2021-06-05 21:50:56,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:56,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804557870] [2021-06-05 21:50:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:56,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804557870] [2021-06-05 21:50:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804557870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439601471] [2021-06-05 21:50:56,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:56,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:50:56,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:56,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:50:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:57,072 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:57,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439601471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:57,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:57,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:57,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439458713] [2021-06-05 21:50:57,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:57,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:57,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:57,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:57,208 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:57,695 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-06-05 21:50:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:57,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:57,695 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:50:57,695 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:50:57,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 741.8ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:50:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:50:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-06-05 21:50:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-05 21:50:57,697 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-05 21:50:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:57,697 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-05 21:50:57,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-05 21:50:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:57,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:57,697 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:57,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:57,907 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:57,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1459181130, now seen corresponding path program 184 times [2021-06-05 21:50:57,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:57,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691233769] [2021-06-05 21:50:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:58,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:58,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691233769] [2021-06-05 21:50:58,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691233769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:58,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879275569] [2021-06-05 21:50:58,047 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 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 21:50:58,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:58,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:58,297 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:50:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:58,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879275569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:58,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:58,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:58,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029515358] [2021-06-05 21:50:58,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:58,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:58,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:58,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:58,488 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:59,040 INFO L93 Difference]: Finished difference Result 226 states and 470 transitions. [2021-06-05 21:50:59,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:50:59,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:50:59,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:59,041 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:50:59,041 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:50:59,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:50:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:50:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 159. [2021-06-05 21:50:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-05 21:50:59,044 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-05 21:50:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:59,044 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-05 21:50:59,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-05 21:50:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:50:59,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:59,045 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:59,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-06-05 21:50:59,246 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 428334108, now seen corresponding path program 185 times [2021-06-05 21:50:59,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:59,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850915834] [2021-06-05 21:50:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:59,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850915834] [2021-06-05 21:50:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850915834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536620364] [2021-06-05 21:50:59,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:59,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:50:59,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:59,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:50:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:59,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536620364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:59,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:59,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:50:59,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113029469] [2021-06-05 21:50:59,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:50:59,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:59,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:50:59,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:50:59,817 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:00,625 INFO L93 Difference]: Finished difference Result 207 states and 433 transitions. [2021-06-05 21:51:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:51:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:00,626 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:51:00,626 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:51:00,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1024.2ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:51:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:51:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-06-05 21:51:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.225) internal successors, (356), 160 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-06-05 21:51:00,628 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 18 [2021-06-05 21:51:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:00,628 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-06-05 21:51:00,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-06-05 21:51:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:00,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:00,628 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:00,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:00,833 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1149007622, now seen corresponding path program 186 times [2021-06-05 21:51:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061418782] [2021-06-05 21:51:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:01,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:01,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061418782] [2021-06-05 21:51:01,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061418782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:01,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996489558] [2021-06-05 21:51:01,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:01,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:51:01,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:01,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996489558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:01,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:01,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:01,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942211922] [2021-06-05 21:51:01,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:01,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:01,405 INFO L87 Difference]: Start difference. First operand 161 states and 356 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:03,083 INFO L93 Difference]: Finished difference Result 266 states and 523 transitions. [2021-06-05 21:51:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:51:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:03,084 INFO L225 Difference]: With dead ends: 266 [2021-06-05 21:51:03,084 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:51:03,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1790.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:51:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:51:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 164. [2021-06-05 21:51:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2392638036809815) internal successors, (365), 163 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 365 transitions. [2021-06-05 21:51:03,086 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 365 transitions. Word has length 18 [2021-06-05 21:51:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:03,086 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 365 transitions. [2021-06-05 21:51:03,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 365 transitions. [2021-06-05 21:51:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:03,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:03,086 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:03,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:03,302 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:03,302 INFO L82 PathProgramCache]: Analyzing trace with hash -642661356, now seen corresponding path program 187 times [2021-06-05 21:51:03,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:03,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111076430] [2021-06-05 21:51:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:03,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111076430] [2021-06-05 21:51:03,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111076430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860931286] [2021-06-05 21:51:03,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:03,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:03,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860931286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:03,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:03,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:03,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146032163] [2021-06-05 21:51:03,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:03,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:03,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:03,869 INFO L87 Difference]: Start difference. First operand 164 states and 365 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:04,824 INFO L93 Difference]: Finished difference Result 228 states and 469 transitions. [2021-06-05 21:51:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:51:04,824 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:04,825 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:51:04,825 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:51:04,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1094.3ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:51:04,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:51:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-06-05 21:51:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2378048780487805) internal successors, (367), 164 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 367 transitions. [2021-06-05 21:51:04,826 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 367 transitions. Word has length 18 [2021-06-05 21:51:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:04,826 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 367 transitions. [2021-06-05 21:51:04,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 367 transitions. [2021-06-05 21:51:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:04,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:04,827 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:05,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1338 [2021-06-05 21:51:05,027 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash 154074396, now seen corresponding path program 188 times [2021-06-05 21:51:05,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:05,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227307308] [2021-06-05 21:51:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:05,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227307308] [2021-06-05 21:51:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227307308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89862497] [2021-06-05 21:51:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:51:05,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:05,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:05,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:05,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:05,464 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:05,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89862497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:05,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:05,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:05,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533875324] [2021-06-05 21:51:05,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:05,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:05,598 INFO L87 Difference]: Start difference. First operand 165 states and 367 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:06,094 INFO L93 Difference]: Finished difference Result 233 states and 476 transitions. [2021-06-05 21:51:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:51:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:06,095 INFO L225 Difference]: With dead ends: 233 [2021-06-05 21:51:06,095 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:51:06,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:51:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:51:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 166. [2021-06-05 21:51:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.2363636363636363) internal successors, (369), 165 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 369 transitions. [2021-06-05 21:51:06,097 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 369 transitions. Word has length 18 [2021-06-05 21:51:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:06,097 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 369 transitions. [2021-06-05 21:51:06,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 369 transitions. [2021-06-05 21:51:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:06,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:06,097 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:06,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1351,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:06,313 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2125796294, now seen corresponding path program 189 times [2021-06-05 21:51:06,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:06,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010487457] [2021-06-05 21:51:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:06,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:06,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010487457] [2021-06-05 21:51:06,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010487457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:06,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698800945] [2021-06-05 21:51:06,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:06,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:51:06,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:51:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:06,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698800945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:06,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:06,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436161598] [2021-06-05 21:51:06,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:06,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:06,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:06,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:06,869 INFO L87 Difference]: Start difference. First operand 166 states and 369 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:07,598 INFO L93 Difference]: Finished difference Result 223 states and 456 transitions. [2021-06-05 21:51:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:51:07,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:07,599 INFO L225 Difference]: With dead ends: 223 [2021-06-05 21:51:07,599 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 21:51:07,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 927.3ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 21:51:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2021-06-05 21:51:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-06-05 21:51:07,600 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-06-05 21:51:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:07,600 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-06-05 21:51:07,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-06-05 21:51:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:07,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:07,601 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:07,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-05 21:51:07,801 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060542, now seen corresponding path program 190 times [2021-06-05 21:51:07,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:07,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656795082] [2021-06-05 21:51:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:07,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:07,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656795082] [2021-06-05 21:51:07,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656795082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:07,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204122105] [2021-06-05 21:51:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:07,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:07,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:08,234 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:08,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204122105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:08,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:08,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:08,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065033451] [2021-06-05 21:51:08,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:08,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:08,371 INFO L87 Difference]: Start difference. First operand 168 states and 373 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:09,011 INFO L93 Difference]: Finished difference Result 235 states and 480 transitions. [2021-06-05 21:51:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:51:09,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:09,012 INFO L225 Difference]: With dead ends: 235 [2021-06-05 21:51:09,012 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:51:09,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 845.4ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:51:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:51:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-06-05 21:51:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2349397590361444) internal successors, (371), 166 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-06-05 21:51:09,014 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-06-05 21:51:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:09,014 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-06-05 21:51:09,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-06-05 21:51:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:09,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:09,014 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:09,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-05 21:51:09,214 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:09,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:09,215 INFO L82 PathProgramCache]: Analyzing trace with hash -822714276, now seen corresponding path program 191 times [2021-06-05 21:51:09,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:09,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686056668] [2021-06-05 21:51:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:09,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:09,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686056668] [2021-06-05 21:51:09,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686056668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:09,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807345134] [2021-06-05 21:51:09,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:09,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:51:09,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:09,620 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807345134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:09,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:09,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:09,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067680339] [2021-06-05 21:51:09,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:09,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:09,815 INFO L87 Difference]: Start difference. First operand 167 states and 371 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:10,504 INFO L93 Difference]: Finished difference Result 239 states and 488 transitions. [2021-06-05 21:51:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:51:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:10,505 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:51:10,505 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 21:51:10,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 929.4ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 21:51:10,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 168. [2021-06-05 21:51:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-06-05 21:51:10,507 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-06-05 21:51:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:10,507 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-06-05 21:51:10,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-06-05 21:51:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:10,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:10,507 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:10,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-05 21:51:10,725 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash -858339116, now seen corresponding path program 192 times [2021-06-05 21:51:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:10,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277479457] [2021-06-05 21:51:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:10,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:10,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277479457] [2021-06-05 21:51:10,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277479457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:10,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101095622] [2021-06-05 21:51:10,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:10,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:51:10,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:10,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:11,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101095622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:11,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:11,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:11,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826659795] [2021-06-05 21:51:11,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:11,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:11,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:11,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:11,302 INFO L87 Difference]: Start difference. First operand 168 states and 373 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:12,124 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-06-05 21:51:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:51:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:12,125 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:51:12,125 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:51:12,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:51:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:51:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2021-06-05 21:51:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-06-05 21:51:12,126 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-06-05 21:51:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:12,126 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-06-05 21:51:12,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-06-05 21:51:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:12,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:12,127 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:12,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-06-05 21:51:12,327 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:12,327 INFO L82 PathProgramCache]: Analyzing trace with hash -61603364, now seen corresponding path program 193 times [2021-06-05 21:51:12,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:12,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426707431] [2021-06-05 21:51:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:12,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:12,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426707431] [2021-06-05 21:51:12,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426707431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:12,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303117494] [2021-06-05 21:51:12,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:12,784 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:12,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303117494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:12,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:12,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:12,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828006723] [2021-06-05 21:51:12,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:12,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:12,920 INFO L87 Difference]: Start difference. First operand 171 states and 379 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:13,498 INFO L93 Difference]: Finished difference Result 238 states and 486 transitions. [2021-06-05 21:51:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:51:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:13,498 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:51:13,498 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:51:13,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:51:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:51:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2021-06-05 21:51:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-06-05 21:51:13,500 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-06-05 21:51:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:13,500 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-06-05 21:51:13,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-06-05 21:51:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:13,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:13,503 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:13,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-06-05 21:51:13,709 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 444742902, now seen corresponding path program 194 times [2021-06-05 21:51:13,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:13,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876965600] [2021-06-05 21:51:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:13,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876965600] [2021-06-05 21:51:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876965600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777476001] [2021-06-05 21:51:13,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:13,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:14,105 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:14,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777476001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:14,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:14,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:14,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509575955] [2021-06-05 21:51:14,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:14,296 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:14,877 INFO L93 Difference]: Finished difference Result 240 states and 490 transitions. [2021-06-05 21:51:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:51:14,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:14,877 INFO L225 Difference]: With dead ends: 240 [2021-06-05 21:51:14,877 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 21:51:14,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 828.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:51:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 21:51:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 169. [2021-06-05 21:51:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.232142857142857) internal successors, (375), 168 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 375 transitions. [2021-06-05 21:51:14,879 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 375 transitions. Word has length 18 [2021-06-05 21:51:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:14,879 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 375 transitions. [2021-06-05 21:51:14,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 375 transitions. [2021-06-05 21:51:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:14,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:14,880 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:15,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-06-05 21:51:15,080 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1038392036, now seen corresponding path program 195 times [2021-06-05 21:51:15,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:15,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092104446] [2021-06-05 21:51:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:15,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:15,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092104446] [2021-06-05 21:51:15,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092104446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:15,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277824981] [2021-06-05 21:51:15,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:15,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:51:15,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:51:15,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:15,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277824981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:15,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:15,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:51:15,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708646343] [2021-06-05 21:51:15,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:51:15,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:15,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:51:15,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:51:15,633 INFO L87 Difference]: Start difference. First operand 169 states and 375 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,118 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 21:51:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:16,742 INFO L93 Difference]: Finished difference Result 255 states and 513 transitions. [2021-06-05 21:51:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:51:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:16,743 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:51:16,743 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:51:16,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1293.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:51:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:51:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2021-06-05 21:51:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-06-05 21:51:16,745 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-06-05 21:51:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:16,745 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-06-05 21:51:16,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-06-05 21:51:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:16,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:16,745 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:16,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:16,945 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:16,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1142907740, now seen corresponding path program 196 times [2021-06-05 21:51:16,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:16,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548288100] [2021-06-05 21:51:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:17,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:17,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548288100] [2021-06-05 21:51:17,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548288100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:17,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571956555] [2021-06-05 21:51:17,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:17,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:17,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:17,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:17,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:17,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571956555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:17,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:17,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:51:17,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98866699] [2021-06-05 21:51:17,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:51:17,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:51:17,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:51:17,433 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:17,758 INFO L93 Difference]: Finished difference Result 188 states and 403 transitions. [2021-06-05 21:51:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:17,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:17,758 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:51:17,758 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:51:17,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:51:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:51:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-06-05 21:51:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-06-05 21:51:17,760 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-06-05 21:51:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:17,760 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-06-05 21:51:17,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-06-05 21:51:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:17,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:17,760 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:17,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1446 [2021-06-05 21:51:17,961 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash -510045634, now seen corresponding path program 197 times [2021-06-05 21:51:17,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:17,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633395665] [2021-06-05 21:51:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:18,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:18,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633395665] [2021-06-05 21:51:18,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633395665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:18,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514572320] [2021-06-05 21:51:18,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:18,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:18,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:18,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514572320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:18,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:18,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:51:18,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619530756] [2021-06-05 21:51:18,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:51:18,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:18,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:51:18,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:51:18,556 INFO L87 Difference]: Start difference. First operand 171 states and 379 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:18,916 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-06-05 21:51:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:18,917 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:51:18,917 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:51:18,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:51:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:51:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-06-05 21:51:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-05 21:51:18,919 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 18 [2021-06-05 21:51:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:18,919 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-05 21:51:18,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-05 21:51:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:18,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:18,919 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:19,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-06-05 21:51:19,119 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2087387364, now seen corresponding path program 198 times [2021-06-05 21:51:19,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:19,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20576718] [2021-06-05 21:51:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:19,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20576718] [2021-06-05 21:51:19,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20576718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293551351] [2021-06-05 21:51:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:51:19,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:19,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:19,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:19,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293551351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:19,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:19,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:51:19,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069256206] [2021-06-05 21:51:19,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:51:19,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:51:19,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:51:19,746 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:20,688 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-06-05 21:51:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:51:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:20,688 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:51:20,688 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:51:20,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1210.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:51:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:51:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-06-05 21:51:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-06-05 21:51:20,690 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-06-05 21:51:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:20,690 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-06-05 21:51:20,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-06-05 21:51:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:20,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:20,691 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:20,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:20,891 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:20,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1993180572, now seen corresponding path program 199 times [2021-06-05 21:51:20,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:20,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237053992] [2021-06-05 21:51:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:21,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237053992] [2021-06-05 21:51:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237053992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828758389] [2021-06-05 21:51:21,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:21,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:21,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828758389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:21,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:21,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:21,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131645311] [2021-06-05 21:51:21,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:21,438 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:21,762 INFO L93 Difference]: Finished difference Result 187 states and 404 transitions. [2021-06-05 21:51:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:21,763 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:51:21,763 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:51:21,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 617.4ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:51:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:51:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2021-06-05 21:51:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2339181286549707) internal successors, (382), 171 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-06-05 21:51:21,764 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 18 [2021-06-05 21:51:21,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:21,764 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-06-05 21:51:21,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-06-05 21:51:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:21,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:21,765 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:21,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-06-05 21:51:21,965 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:21,965 INFO L82 PathProgramCache]: Analyzing trace with hash 724444994, now seen corresponding path program 200 times [2021-06-05 21:51:21,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:21,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586509798] [2021-06-05 21:51:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:22,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586509798] [2021-06-05 21:51:22,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586509798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541396737] [2021-06-05 21:51:22,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:22,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:22,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:22,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541396737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:22,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:22,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:22,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581254305] [2021-06-05 21:51:22,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:22,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:22,541 INFO L87 Difference]: Start difference. First operand 172 states and 382 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:23,058 INFO L93 Difference]: Finished difference Result 218 states and 454 transitions. [2021-06-05 21:51:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:51:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:23,059 INFO L225 Difference]: With dead ends: 218 [2021-06-05 21:51:23,059 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:51:23,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:51:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:51:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2021-06-05 21:51:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 21:51:23,061 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 18 [2021-06-05 21:51:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:23,061 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 21:51:23,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 21:51:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:23,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:23,061 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:23,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:23,261 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2059036324, now seen corresponding path program 201 times [2021-06-05 21:51:23,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:23,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421353957] [2021-06-05 21:51:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:23,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:23,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421353957] [2021-06-05 21:51:23,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421353957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:23,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846746320] [2021-06-05 21:51:23,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:23,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:23,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:23,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:23,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:23,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846746320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:23,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:23,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:23,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167940774] [2021-06-05 21:51:23,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:23,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:23,805 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:24,837 INFO L93 Difference]: Finished difference Result 250 states and 508 transitions. [2021-06-05 21:51:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:51:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:24,837 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:51:24,837 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:51:24,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1197.4ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:51:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:51:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2021-06-05 21:51:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-06-05 21:51:24,839 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-06-05 21:51:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:24,839 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-06-05 21:51:24,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-06-05 21:51:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:24,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:24,840 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:25,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-06-05 21:51:25,040 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:25,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1437986497, now seen corresponding path program 202 times [2021-06-05 21:51:25,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:25,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580478157] [2021-06-05 21:51:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:51:25,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:25,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580478157] [2021-06-05 21:51:25,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580478157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:25,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067885084] [2021-06-05 21:51:25,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:25,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:51:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:51:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067885084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:25,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:25,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:25,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728067477] [2021-06-05 21:51:25,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:25,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:25,267 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:25,577 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-06-05 21:51:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:25,578 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:51:25,578 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:51:25,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:51:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 174. [2021-06-05 21:51:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-06-05 21:51:25,580 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-06-05 21:51:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:25,580 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-06-05 21:51:25,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-06-05 21:51:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:25,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:25,580 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:25,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:25,781 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1230791260, now seen corresponding path program 203 times [2021-06-05 21:51:25,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:25,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875465745] [2021-06-05 21:51:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:25,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:25,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875465745] [2021-06-05 21:51:25,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875465745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:25,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360648275] [2021-06-05 21:51:25,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:26,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:51:26,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 21:51:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:26,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360648275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:26,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:26,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:26,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536055878] [2021-06-05 21:51:26,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:26,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:26,440 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:26,699 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 21:51:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:27,097 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-06-05 21:51:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:51:27,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:27,097 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:51:27,097 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:51:27,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:51:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:51:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 176. [2021-06-05 21:51:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-06-05 21:51:27,099 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-06-05 21:51:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:27,099 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-06-05 21:51:27,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-06-05 21:51:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:27,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:27,100 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:27,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-06-05 21:51:27,300 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1729584706, now seen corresponding path program 204 times [2021-06-05 21:51:27,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:27,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075999941] [2021-06-05 21:51:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:27,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:27,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075999941] [2021-06-05 21:51:27,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075999941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:27,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025884776] [2021-06-05 21:51:27,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:27,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:51:27,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:51:27,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:27,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025884776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:27,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:27,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:27,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967376317] [2021-06-05 21:51:27,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:27,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:27,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:27,766 INFO L87 Difference]: Start difference. First operand 176 states and 390 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:28,661 INFO L93 Difference]: Finished difference Result 273 states and 546 transitions. [2021-06-05 21:51:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:51:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:28,661 INFO L225 Difference]: With dead ends: 273 [2021-06-05 21:51:28,661 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 21:51:28,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1000.9ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:51:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 21:51:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 178. [2021-06-05 21:51:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:51:28,663 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 18 [2021-06-05 21:51:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:28,663 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:51:28,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:51:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:28,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:28,664 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:28,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1530,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:28,864 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2027527012, now seen corresponding path program 205 times [2021-06-05 21:51:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:28,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483005583] [2021-06-05 21:51:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:29,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:29,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483005583] [2021-06-05 21:51:29,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483005583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:29,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846576892] [2021-06-05 21:51:29,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:29,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:29,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846576892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:29,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:29,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:29,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079263267] [2021-06-05 21:51:29,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:29,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:29,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:29,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:29,307 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:30,161 INFO L93 Difference]: Finished difference Result 262 states and 533 transitions. [2021-06-05 21:51:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:51:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:30,162 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:51:30,162 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:51:30,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 937.4ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:51:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:51:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 174. [2021-06-05 21:51:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.213872832369942) internal successors, (383), 173 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 383 transitions. [2021-06-05 21:51:30,164 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 383 transitions. Word has length 18 [2021-06-05 21:51:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:30,164 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 383 transitions. [2021-06-05 21:51:30,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 383 transitions. [2021-06-05 21:51:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:30,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:30,164 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:30,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1542 [2021-06-05 21:51:30,364 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:30,365 INFO L82 PathProgramCache]: Analyzing trace with hash -725723394, now seen corresponding path program 206 times [2021-06-05 21:51:30,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:30,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290777080] [2021-06-05 21:51:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:30,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:30,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290777080] [2021-06-05 21:51:30,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290777080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:30,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709251567] [2021-06-05 21:51:30,516 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 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 21:51:30,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:30,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:30,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709251567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:30,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:30,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:30,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149842982] [2021-06-05 21:51:30,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:30,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:30,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:30,875 INFO L87 Difference]: Start difference. First operand 174 states and 383 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:31,307 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-06-05 21:51:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:51:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:31,307 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:51:31,307 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:51:31,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 666.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:51:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:51:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-06-05 21:51:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-06-05 21:51:31,309 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-06-05 21:51:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:31,309 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-06-05 21:51:31,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-06-05 21:51:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:31,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:31,309 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:31,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-06-05 21:51:31,510 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1991902172, now seen corresponding path program 207 times [2021-06-05 21:51:31,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:31,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898244311] [2021-06-05 21:51:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:31,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898244311] [2021-06-05 21:51:31,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898244311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:31,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641228487] [2021-06-05 21:51:31,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:31,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:51:31,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:51:31,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:32,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641228487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:32,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:32,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:32,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921286510] [2021-06-05 21:51:32,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:32,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:32,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:32,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:32,083 INFO L87 Difference]: Start difference. First operand 176 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:32,883 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-06-05 21:51:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:51:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:32,883 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:51:32,883 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:51:32,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1028.6ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:51:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 177. [2021-06-05 21:51:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.210227272727273) internal successors, (389), 176 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 389 transitions. [2021-06-05 21:51:32,885 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 389 transitions. Word has length 18 [2021-06-05 21:51:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:32,885 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 389 transitions. [2021-06-05 21:51:32,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 389 transitions. [2021-06-05 21:51:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:32,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:32,886 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:33,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-06-05 21:51:33,086 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -968473794, now seen corresponding path program 208 times [2021-06-05 21:51:33,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:33,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520250253] [2021-06-05 21:51:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:33,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:33,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520250253] [2021-06-05 21:51:33,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520250253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:33,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552982861] [2021-06-05 21:51:33,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:33,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:33,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:33,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552982861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:33,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:33,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:33,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093434024] [2021-06-05 21:51:33,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:33,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:33,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:33,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:33,586 INFO L87 Difference]: Start difference. First operand 177 states and 389 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:34,376 INFO L93 Difference]: Finished difference Result 237 states and 483 transitions. [2021-06-05 21:51:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:51:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:34,377 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:51:34,377 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:51:34,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 950.5ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:51:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:51:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2021-06-05 21:51:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-06-05 21:51:34,378 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-06-05 21:51:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:34,378 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-06-05 21:51:34,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-06-05 21:51:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:34,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:34,379 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:34,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-06-05 21:51:34,579 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1796718858, now seen corresponding path program 209 times [2021-06-05 21:51:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:34,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143618413] [2021-06-05 21:51:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:34,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:34,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143618413] [2021-06-05 21:51:34,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143618413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:34,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696613543] [2021-06-05 21:51:34,786 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 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 21:51:34,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:34,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:34,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:35,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696613543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:35,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:35,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612832100] [2021-06-05 21:51:35,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:35,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:35,146 INFO L87 Difference]: Start difference. First operand 176 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:35,548 INFO L93 Difference]: Finished difference Result 207 states and 439 transitions. [2021-06-05 21:51:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:35,549 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:51:35,549 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:51:35,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 628.8ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:51:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:51:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2021-06-05 21:51:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.209039548022599) internal successors, (391), 177 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 391 transitions. [2021-06-05 21:51:35,550 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 391 transitions. Word has length 18 [2021-06-05 21:51:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:35,550 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 391 transitions. [2021-06-05 21:51:35,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 391 transitions. [2021-06-05 21:51:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:35,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:35,551 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:35,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-05 21:51:35,751 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:35,751 INFO L82 PathProgramCache]: Analyzing trace with hash -462127528, now seen corresponding path program 210 times [2021-06-05 21:51:35,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:35,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126290458] [2021-06-05 21:51:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:35,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126290458] [2021-06-05 21:51:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126290458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714448666] [2021-06-05 21:51:35,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:35,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:51:35,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:35,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:36,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714448666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:36,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:36,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568771906] [2021-06-05 21:51:36,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:36,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:36,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:36,263 INFO L87 Difference]: Start difference. First operand 178 states and 391 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:37,324 INFO L93 Difference]: Finished difference Result 268 states and 536 transitions. [2021-06-05 21:51:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:51:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:37,325 INFO L225 Difference]: With dead ends: 268 [2021-06-05 21:51:37,325 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 21:51:37,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1232.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:51:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 21:51:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 179. [2021-06-05 21:51:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.207865168539326) internal successors, (393), 178 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 393 transitions. [2021-06-05 21:51:37,338 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 393 transitions. Word has length 18 [2021-06-05 21:51:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:37,338 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 393 transitions. [2021-06-05 21:51:37,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 393 transitions. [2021-06-05 21:51:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:37,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:37,339 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:37,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:37,555 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash -999983106, now seen corresponding path program 211 times [2021-06-05 21:51:37,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:37,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593929164] [2021-06-05 21:51:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:37,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:37,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593929164] [2021-06-05 21:51:37,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593929164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:37,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557977576] [2021-06-05 21:51:37,700 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 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 21:51:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:37,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:37,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:37,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557977576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:37,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:37,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:37,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883550300] [2021-06-05 21:51:37,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:37,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:37,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:37,993 INFO L87 Difference]: Start difference. First operand 179 states and 393 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:38,758 INFO L93 Difference]: Finished difference Result 245 states and 513 transitions. [2021-06-05 21:51:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:51:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:38,758 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:51:38,758 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:51:38,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 831.0ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:51:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:51:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 182. [2021-06-05 21:51:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2209944751381214) internal successors, (402), 181 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 402 transitions. [2021-06-05 21:51:38,760 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 402 transitions. Word has length 18 [2021-06-05 21:51:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:38,760 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 402 transitions. [2021-06-05 21:51:38,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 402 transitions. [2021-06-05 21:51:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:38,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:38,761 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:38,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:38,961 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1015113500, now seen corresponding path program 212 times [2021-06-05 21:51:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:38,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781474428] [2021-06-05 21:51:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:39,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:39,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781474428] [2021-06-05 21:51:39,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781474428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:39,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431202037] [2021-06-05 21:51:39,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:39,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:39,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431202037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:39,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:39,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:39,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562424960] [2021-06-05 21:51:39,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:39,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:39,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:39,513 INFO L87 Difference]: Start difference. First operand 182 states and 402 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:40,376 INFO L93 Difference]: Finished difference Result 260 states and 519 transitions. [2021-06-05 21:51:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:51:40,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:40,377 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:51:40,377 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 21:51:40,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1054.5ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 21:51:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-06-05 21:51:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2252747252747254) internal successors, (405), 182 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 405 transitions. [2021-06-05 21:51:40,378 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 405 transitions. Word has length 18 [2021-06-05 21:51:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:40,379 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 405 transitions. [2021-06-05 21:51:40,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 405 transitions. [2021-06-05 21:51:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:40,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:40,379 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:40,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:40,579 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1698620183, now seen corresponding path program 213 times [2021-06-05 21:51:40,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:40,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304720130] [2021-06-05 21:51:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:51:40,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:40,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304720130] [2021-06-05 21:51:40,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304720130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:40,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529717862] [2021-06-05 21:51:40,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:40,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:51:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:51:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:51:40,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529717862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:40,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:40,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:40,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578096306] [2021-06-05 21:51:40,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:40,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:40,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:40,853 INFO L87 Difference]: Start difference. First operand 183 states and 405 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:40,916 INFO L93 Difference]: Finished difference Result 184 states and 405 transitions. [2021-06-05 21:51:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:40,917 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:51:40,917 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:51:40,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:51:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 176. [2021-06-05 21:51:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-06-05 21:51:40,919 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-06-05 21:51:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:40,919 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-06-05 21:51:40,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-06-05 21:51:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:40,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:40,919 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:41,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-06-05 21:51:41,119 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:41,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1945262466, now seen corresponding path program 214 times [2021-06-05 21:51:41,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:41,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903606671] [2021-06-05 21:51:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:41,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:41,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903606671] [2021-06-05 21:51:41,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903606671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:41,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976722054] [2021-06-05 21:51:41,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:41,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:41,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:41,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:41,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:41,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976722054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:41,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:41,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:41,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922684699] [2021-06-05 21:51:41,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:41,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:41,594 INFO L87 Difference]: Start difference. First operand 176 states and 390 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:42,272 INFO L93 Difference]: Finished difference Result 247 states and 500 transitions. [2021-06-05 21:51:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:51:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:42,273 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:51:42,273 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 21:51:42,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 819.0ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 21:51:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-06-05 21:51:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2298850574712645) internal successors, (388), 174 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 388 transitions. [2021-06-05 21:51:42,275 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 388 transitions. Word has length 18 [2021-06-05 21:51:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:42,275 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 388 transitions. [2021-06-05 21:51:42,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 388 transitions. [2021-06-05 21:51:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:42,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:42,275 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:42,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:42,475 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1811849252, now seen corresponding path program 215 times [2021-06-05 21:51:42,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:42,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905128401] [2021-06-05 21:51:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:42,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:42,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905128401] [2021-06-05 21:51:42,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905128401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:42,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192864953] [2021-06-05 21:51:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:42,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:42,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:42,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:42,888 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:43,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192864953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:43,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:43,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:43,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337666] [2021-06-05 21:51:43,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:43,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:43,008 INFO L87 Difference]: Start difference. First operand 175 states and 388 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:43,893 INFO L93 Difference]: Finished difference Result 254 states and 520 transitions. [2021-06-05 21:51:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:51:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:43,894 INFO L225 Difference]: With dead ends: 254 [2021-06-05 21:51:43,894 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:51:43,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1097.3ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:51:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:51:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2021-06-05 21:51:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-06-05 21:51:43,895 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 18 [2021-06-05 21:51:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:43,896 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-06-05 21:51:43,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-06-05 21:51:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:43,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:43,896 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:44,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-06-05 21:51:44,109 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:44,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1976771778, now seen corresponding path program 216 times [2021-06-05 21:51:44,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:44,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868799585] [2021-06-05 21:51:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:44,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:44,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868799585] [2021-06-05 21:51:44,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868799585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:44,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079615022] [2021-06-05 21:51:44,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:44,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:44,501 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:44,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079615022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:44,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:44,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:44,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057651204] [2021-06-05 21:51:44,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:44,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:44,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:44,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:44,688 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:45,936 INFO L93 Difference]: Finished difference Result 284 states and 575 transitions. [2021-06-05 21:51:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:51:45,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:45,937 INFO L225 Difference]: With dead ends: 284 [2021-06-05 21:51:45,937 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:51:45,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1436.3ms TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:51:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:51:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 180. [2021-06-05 21:51:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2513966480446927) internal successors, (403), 179 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 403 transitions. [2021-06-05 21:51:45,939 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 403 transitions. Word has length 18 [2021-06-05 21:51:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:45,939 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 403 transitions. [2021-06-05 21:51:45,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 403 transitions. [2021-06-05 21:51:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:45,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:45,939 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:46,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1659 [2021-06-05 21:51:46,140 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash -89256540, now seen corresponding path program 217 times [2021-06-05 21:51:46,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:46,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197080986] [2021-06-05 21:51:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:46,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197080986] [2021-06-05 21:51:46,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197080986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952381374] [2021-06-05 21:51:46,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:46,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952381374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:46,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:46,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:46,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490828566] [2021-06-05 21:51:46,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:46,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:46,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:46,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:46,723 INFO L87 Difference]: Start difference. First operand 180 states and 403 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:47,165 INFO L93 Difference]: Finished difference Result 198 states and 431 transitions. [2021-06-05 21:51:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:51:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:47,166 INFO L225 Difference]: With dead ends: 198 [2021-06-05 21:51:47,166 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 21:51:47,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 687.8ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:51:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 21:51:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-06-05 21:51:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.25) internal successors, (405), 180 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 405 transitions. [2021-06-05 21:51:47,167 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 405 transitions. Word has length 18 [2021-06-05 21:51:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:47,168 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 405 transitions. [2021-06-05 21:51:47,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 405 transitions. [2021-06-05 21:51:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:47,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:47,168 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:47,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-05 21:51:47,368 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1666598270, now seen corresponding path program 218 times [2021-06-05 21:51:47,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:47,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42766626] [2021-06-05 21:51:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:47,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:47,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42766626] [2021-06-05 21:51:47,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42766626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:47,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747586258] [2021-06-05 21:51:47,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:47,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:47,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:47,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:47,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:48,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747586258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:48,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:48,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:48,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563998520] [2021-06-05 21:51:48,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:48,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:48,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:48,027 INFO L87 Difference]: Start difference. First operand 181 states and 405 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:48,900 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2021-06-05 21:51:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:49,060 INFO L93 Difference]: Finished difference Result 211 states and 455 transitions. [2021-06-05 21:51:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:51:49,061 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:49,061 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:51:49,061 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:51:49,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1253.1ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:51:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 182. [2021-06-05 21:51:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.248618784530387) internal successors, (407), 181 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 407 transitions. [2021-06-05 21:51:49,063 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 407 transitions. Word has length 18 [2021-06-05 21:51:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:49,063 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 407 transitions. [2021-06-05 21:51:49,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 407 transitions. [2021-06-05 21:51:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:49,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:49,063 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:49,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1680 [2021-06-05 21:51:49,263 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:49,264 INFO L82 PathProgramCache]: Analyzing trace with hash -332006940, now seen corresponding path program 219 times [2021-06-05 21:51:49,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:49,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974827995] [2021-06-05 21:51:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:49,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974827995] [2021-06-05 21:51:49,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974827995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135690754] [2021-06-05 21:51:49,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:49,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:51:49,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:49,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135690754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:49,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:49,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:49,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615792570] [2021-06-05 21:51:49,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:49,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:49,837 INFO L87 Difference]: Start difference. First operand 182 states and 407 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:50,652 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 21:51:50,792 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-05 21:51:50,927 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 21:51:51,124 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 21:51:51,271 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-06-05 21:51:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:51,673 INFO L93 Difference]: Finished difference Result 264 states and 548 transitions. [2021-06-05 21:51:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:51:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:51,674 INFO L225 Difference]: With dead ends: 264 [2021-06-05 21:51:51,674 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:51:51,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1949.3ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:51:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:51:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2021-06-05 21:51:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.266304347826087) internal successors, (417), 184 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 417 transitions. [2021-06-05 21:51:51,676 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 417 transitions. Word has length 18 [2021-06-05 21:51:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:51,676 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 417 transitions. [2021-06-05 21:51:51,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 417 transitions. [2021-06-05 21:51:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:51,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:51,676 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:51,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-06-05 21:51:51,876 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1160252004, now seen corresponding path program 220 times [2021-06-05 21:51:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:51,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261599141] [2021-06-05 21:51:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:52,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261599141] [2021-06-05 21:51:52,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261599141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528689431] [2021-06-05 21:51:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:52,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:52,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:52,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528689431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:52,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:52,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:52,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270582376] [2021-06-05 21:51:52,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:52,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:52,429 INFO L87 Difference]: Start difference. First operand 185 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:53,120 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-06-05 21:51:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:51:53,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:53,120 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:51:53,121 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 21:51:53,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 21:51:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-06-05 21:51:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.263440860215054) internal successors, (421), 186 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 421 transitions. [2021-06-05 21:51:53,122 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 421 transitions. Word has length 18 [2021-06-05 21:51:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:53,122 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 421 transitions. [2021-06-05 21:51:53,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 421 transitions. [2021-06-05 21:51:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:53,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:53,123 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:53,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:53,327 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:53,328 INFO L82 PathProgramCache]: Analyzing trace with hash 174339326, now seen corresponding path program 221 times [2021-06-05 21:51:53,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:53,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000685158] [2021-06-05 21:51:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:53,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000685158] [2021-06-05 21:51:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000685158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:53,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752250547] [2021-06-05 21:51:53,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:51:53,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:51:53,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:53,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:53,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:53,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752250547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:53,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:53,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365540560] [2021-06-05 21:51:53,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:53,850 INFO L87 Difference]: Start difference. First operand 187 states and 421 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:54,591 INFO L93 Difference]: Finished difference Result 263 states and 543 transitions. [2021-06-05 21:51:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:51:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:54,592 INFO L225 Difference]: With dead ends: 263 [2021-06-05 21:51:54,592 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:51:54,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 930.2ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:51:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:51:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-06-05 21:51:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-06-05 21:51:54,594 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 18 [2021-06-05 21:51:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:54,594 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-06-05 21:51:54,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-06-05 21:51:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:54,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:54,594 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:54,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1714 [2021-06-05 21:51:54,794 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash -363516252, now seen corresponding path program 222 times [2021-06-05 21:51:54,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:54,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891402930] [2021-06-05 21:51:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891402930] [2021-06-05 21:51:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891402930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656767856] [2021-06-05 21:51:54,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:54,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:51:54,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:54,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:54,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:55,223 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:55,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656767856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:55,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:55,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210167758] [2021-06-05 21:51:55,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:55,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:55,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:55,375 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:56,267 INFO L93 Difference]: Finished difference Result 265 states and 553 transitions. [2021-06-05 21:51:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:51:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:56,268 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:51:56,268 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 21:51:56,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:51:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 21:51:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-06-05 21:51:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-06-05 21:51:56,270 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-06-05 21:51:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:56,270 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-06-05 21:51:56,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,270 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-06-05 21:51:56,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:56,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:56,270 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:56,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:56,470 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:56,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1651580354, now seen corresponding path program 223 times [2021-06-05 21:51:56,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:56,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534432677] [2021-06-05 21:51:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:56,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:56,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534432677] [2021-06-05 21:51:56,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534432677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:56,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615139343] [2021-06-05 21:51:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:56,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:57,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615139343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:57,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:57,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:57,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203826000] [2021-06-05 21:51:57,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:57,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:57,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:57,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:57,016 INFO L87 Difference]: Start difference. First operand 188 states and 423 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:57,706 INFO L93 Difference]: Finished difference Result 245 states and 511 transitions. [2021-06-05 21:51:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:51:57,706 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:57,707 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:51:57,707 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:51:57,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 876.3ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:51:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:51:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-06-05 21:51:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.259259259259259) internal successors, (427), 189 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 427 transitions. [2021-06-05 21:51:57,708 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 427 transitions. Word has length 18 [2021-06-05 21:51:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:57,708 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 427 transitions. [2021-06-05 21:51:57,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 427 transitions. [2021-06-05 21:51:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:57,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:57,709 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:57,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:57,909 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1846651190, now seen corresponding path program 224 times [2021-06-05 21:51:57,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:57,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920995861] [2021-06-05 21:51:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:58,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:58,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920995861] [2021-06-05 21:51:58,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920995861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:58,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775529563] [2021-06-05 21:51:58,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:58,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:58,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:51:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:58,331 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:51:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:58,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775529563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:58,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:58,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:58,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401194017] [2021-06-05 21:51:58,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:58,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:58,453 INFO L87 Difference]: Start difference. First operand 190 states and 427 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:59,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:59,038 INFO L93 Difference]: Finished difference Result 266 states and 546 transitions. [2021-06-05 21:51:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:51:59,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:51:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:59,039 INFO L225 Difference]: With dead ends: 266 [2021-06-05 21:51:59,039 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:51:59,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:51:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:51:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 189. [2021-06-05 21:51:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.2606382978723403) internal successors, (425), 188 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 425 transitions. [2021-06-05 21:51:59,040 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 425 transitions. Word has length 18 [2021-06-05 21:51:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:59,041 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 425 transitions. [2021-06-05 21:51:59,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 425 transitions. [2021-06-05 21:51:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:51:59,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:59,041 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:59,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-05 21:51:59,241 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1340304924, now seen corresponding path program 225 times [2021-06-05 21:51:59,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:59,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476409982] [2021-06-05 21:51:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:59,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:59,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476409982] [2021-06-05 21:51:59,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476409982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:59,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644407091] [2021-06-05 21:51:59,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:59,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:51:59,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:59,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:51:59,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:59,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644407091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:59,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:59,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:51:59,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128121356] [2021-06-05 21:51:59,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:51:59,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:51:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:59,745 INFO L87 Difference]: Start difference. First operand 189 states and 425 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:00,415 INFO L93 Difference]: Finished difference Result 270 states and 554 transitions. [2021-06-05 21:52:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:52:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:00,416 INFO L225 Difference]: With dead ends: 270 [2021-06-05 21:52:00,416 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 21:52:00,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 801.0ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:52:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 21:52:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 188. [2021-06-05 21:52:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-06-05 21:52:00,418 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-06-05 21:52:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:00,418 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-06-05 21:52:00,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-06-05 21:52:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:00,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:00,418 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:00,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-05 21:52:00,618 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1375929764, now seen corresponding path program 226 times [2021-06-05 21:52:00,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:00,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562242179] [2021-06-05 21:52:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:00,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562242179] [2021-06-05 21:52:00,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562242179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844351618] [2021-06-05 21:52:00,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:00,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:00,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:01,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844351618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:01,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:01,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:01,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449497431] [2021-06-05 21:52:01,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:01,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:01,207 INFO L87 Difference]: Start difference. First operand 188 states and 423 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:02,365 INFO L93 Difference]: Finished difference Result 265 states and 542 transitions. [2021-06-05 21:52:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:52:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:02,365 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:52:02,365 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 21:52:02,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1325.7ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:52:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 21:52:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2021-06-05 21:52:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-06-05 21:52:02,367 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-06-05 21:52:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:02,367 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-06-05 21:52:02,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-06-05 21:52:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:02,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:02,368 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:02,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-06-05 21:52:02,568 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:02,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:02,568 INFO L82 PathProgramCache]: Analyzing trace with hash -579194012, now seen corresponding path program 227 times [2021-06-05 21:52:02,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:02,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696974397] [2021-06-05 21:52:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:02,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696974397] [2021-06-05 21:52:02,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696974397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095642061] [2021-06-05 21:52:02,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:02,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:02,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:02,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:02,992 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:52:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:03,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095642061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:03,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:03,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:03,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622421892] [2021-06-05 21:52:03,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:03,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:03,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:03,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:03,124 INFO L87 Difference]: Start difference. First operand 188 states and 422 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:03,629 INFO L93 Difference]: Finished difference Result 267 states and 547 transitions. [2021-06-05 21:52:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:52:03,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:03,629 INFO L225 Difference]: With dead ends: 267 [2021-06-05 21:52:03,629 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:52:03,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 725.8ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:52:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:52:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-06-05 21:52:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-06-05 21:52:03,631 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-06-05 21:52:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:03,631 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-06-05 21:52:03,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-06-05 21:52:03,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:03,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:03,632 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:03,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1784,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:03,849 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash -72847746, now seen corresponding path program 228 times [2021-06-05 21:52:03,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:03,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163726181] [2021-06-05 21:52:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:04,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:04,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163726181] [2021-06-05 21:52:04,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163726181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:04,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083783292] [2021-06-05 21:52:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:04,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:52:04,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:04,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:04,271 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:52:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:04,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083783292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:04,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:04,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:04,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756429016] [2021-06-05 21:52:04,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:04,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:04,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:04,457 INFO L87 Difference]: Start difference. First operand 188 states and 422 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:05,532 INFO L93 Difference]: Finished difference Result 305 states and 613 transitions. [2021-06-05 21:52:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:52:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:05,533 INFO L225 Difference]: With dead ends: 305 [2021-06-05 21:52:05,533 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:52:05,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1288.7ms TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:52:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:52:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 192. [2021-06-05 21:52:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.261780104712042) internal successors, (432), 191 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 432 transitions. [2021-06-05 21:52:05,535 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 432 transitions. Word has length 18 [2021-06-05 21:52:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:05,535 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 432 transitions. [2021-06-05 21:52:05,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 432 transitions. [2021-06-05 21:52:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:05,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:05,535 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:05,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-06-05 21:52:05,735 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:05,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1555982684, now seen corresponding path program 229 times [2021-06-05 21:52:05,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:05,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788167535] [2021-06-05 21:52:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:05,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:05,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788167535] [2021-06-05 21:52:05,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788167535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:05,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308647863] [2021-06-05 21:52:05,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:06,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308647863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:06,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:06,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:52:06,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795655852] [2021-06-05 21:52:06,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:52:06,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:06,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:52:06,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:06,237 INFO L87 Difference]: Start difference. First operand 192 states and 432 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:07,531 INFO L93 Difference]: Finished difference Result 288 states and 593 transitions. [2021-06-05 21:52:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:52:07,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:07,532 INFO L225 Difference]: With dead ends: 288 [2021-06-05 21:52:07,532 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 21:52:07,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1376.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:52:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 21:52:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2021-06-05 21:52:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2604166666666665) internal successors, (434), 192 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 434 transitions. [2021-06-05 21:52:07,534 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 434 transitions. Word has length 18 [2021-06-05 21:52:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:07,534 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 434 transitions. [2021-06-05 21:52:07,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 434 transitions. [2021-06-05 21:52:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:07,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:07,535 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:07,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 21:52:07,735 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash 179489888, now seen corresponding path program 230 times [2021-06-05 21:52:07,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099360332] [2021-06-05 21:52:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:07,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:07,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099360332] [2021-06-05 21:52:07,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099360332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:07,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641804404] [2021-06-05 21:52:07,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:07,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:07,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:07,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:07,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:08,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641804404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:08,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:08,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:08,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203338775] [2021-06-05 21:52:08,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:08,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:08,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:08,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:08,299 INFO L87 Difference]: Start difference. First operand 193 states and 434 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:08,467 INFO L93 Difference]: Finished difference Result 213 states and 463 transitions. [2021-06-05 21:52:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:08,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:08,468 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:52:08,468 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:52:08,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:52:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2021-06-05 21:52:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-06-05 21:52:08,470 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-06-05 21:52:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:08,470 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-06-05 21:52:08,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-06-05 21:52:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:08,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:08,470 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:08,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:08,671 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1397851842, now seen corresponding path program 231 times [2021-06-05 21:52:08,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:08,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062247746] [2021-06-05 21:52:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:08,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:08,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062247746] [2021-06-05 21:52:08,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062247746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:08,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858771052] [2021-06-05 21:52:08,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:08,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:52:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:09,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858771052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:09,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:09,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:09,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817082562] [2021-06-05 21:52:09,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:09,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:09,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:09,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:09,286 INFO L87 Difference]: Start difference. First operand 194 states and 436 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:09,664 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 21:52:09,941 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-06-05 21:52:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:10,453 INFO L93 Difference]: Finished difference Result 277 states and 570 transitions. [2021-06-05 21:52:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:52:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:10,453 INFO L225 Difference]: With dead ends: 277 [2021-06-05 21:52:10,453 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 21:52:10,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1453.6ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:52:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 21:52:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 196. [2021-06-05 21:52:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-06-05 21:52:10,455 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-06-05 21:52:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:10,455 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-06-05 21:52:10,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-06-05 21:52:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:10,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:10,456 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:10,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:10,656 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash -63260512, now seen corresponding path program 232 times [2021-06-05 21:52:10,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:10,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118155494] [2021-06-05 21:52:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:10,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:10,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118155494] [2021-06-05 21:52:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118155494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:10,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003844321] [2021-06-05 21:52:10,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:10,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:11,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003844321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:11,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:11,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:11,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426731521] [2021-06-05 21:52:11,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:11,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:11,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:11,151 INFO L87 Difference]: Start difference. First operand 196 states and 442 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:11,889 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 21:52:12,095 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 21:52:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:12,241 INFO L93 Difference]: Finished difference Result 271 states and 568 transitions. [2021-06-05 21:52:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:52:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:12,242 INFO L225 Difference]: With dead ends: 271 [2021-06-05 21:52:12,242 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:52:12,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1262.7ms TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:52:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:52:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-06-05 21:52:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-06-05 21:52:12,244 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-06-05 21:52:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:12,244 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-06-05 21:52:12,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-06-05 21:52:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:12,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:12,244 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:12,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-06-05 21:52:12,445 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash -684310339, now seen corresponding path program 233 times [2021-06-05 21:52:12,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:12,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936111469] [2021-06-05 21:52:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:52:12,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:12,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936111469] [2021-06-05 21:52:12,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936111469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:12,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489063363] [2021-06-05 21:52:12,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:12,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:12,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:12,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:52:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:52:12,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489063363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:12,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:12,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:12,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673515057] [2021-06-05 21:52:12,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:12,683 INFO L87 Difference]: Start difference. First operand 197 states and 444 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:12,919 INFO L93 Difference]: Finished difference Result 227 states and 502 transitions. [2021-06-05 21:52:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:52:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:12,920 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:52:12,920 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:52:12,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:52:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-06-05 21:52:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-06-05 21:52:12,922 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-06-05 21:52:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:12,922 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-06-05 21:52:12,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-06-05 21:52:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:12,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:12,922 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:13,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1850 [2021-06-05 21:52:13,122 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:13,122 INFO L82 PathProgramCache]: Analyzing trace with hash -891505576, now seen corresponding path program 234 times [2021-06-05 21:52:13,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:13,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612153121] [2021-06-05 21:52:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:13,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:13,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612153121] [2021-06-05 21:52:13,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612153121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:13,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618196757] [2021-06-05 21:52:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:13,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:13,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:13,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:13,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:13,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618196757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:13,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:13,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:13,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048818027] [2021-06-05 21:52:13,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:13,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:13,679 INFO L87 Difference]: Start difference. First operand 196 states and 442 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:14,304 INFO L93 Difference]: Finished difference Result 249 states and 526 transitions. [2021-06-05 21:52:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:14,305 INFO L225 Difference]: With dead ends: 249 [2021-06-05 21:52:14,305 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:52:14,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 863.2ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:52:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:52:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-06-05 21:52:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-06-05 21:52:14,307 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-06-05 21:52:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:14,307 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-06-05 21:52:14,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-06-05 21:52:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:14,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:14,307 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:14,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-06-05 21:52:14,508 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash -94769824, now seen corresponding path program 235 times [2021-06-05 21:52:14,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:14,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145064300] [2021-06-05 21:52:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:14,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:14,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145064300] [2021-06-05 21:52:14,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145064300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:14,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257433056] [2021-06-05 21:52:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:14,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257433056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:14,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:14,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:14,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815669372] [2021-06-05 21:52:14,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:14,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:14,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:14,953 INFO L87 Difference]: Start difference. First operand 197 states and 444 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:15,648 INFO L93 Difference]: Finished difference Result 248 states and 531 transitions. [2021-06-05 21:52:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:52:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:15,648 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:52:15,648 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 21:52:15,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 807.8ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:52:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 21:52:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 194. [2021-06-05 21:52:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-06-05 21:52:15,650 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-06-05 21:52:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:15,650 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-06-05 21:52:15,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-06-05 21:52:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:15,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:15,651 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:15,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:15,851 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:15,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1920326782, now seen corresponding path program 236 times [2021-06-05 21:52:15,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:15,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11404435] [2021-06-05 21:52:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:16,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:16,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11404435] [2021-06-05 21:52:16,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11404435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:16,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156654436] [2021-06-05 21:52:16,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:16,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:16,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:16,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156654436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:16,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:16,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:16,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569197269] [2021-06-05 21:52:16,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:16,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:16,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:16,411 INFO L87 Difference]: Start difference. First operand 194 states and 436 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:17,257 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-06-05 21:52:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:52:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:17,257 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:52:17,257 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:52:17,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1058.5ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:52:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:52:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 197. [2021-06-05 21:52:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-05 21:52:17,259 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-05 21:52:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:17,259 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-05 21:52:17,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-05 21:52:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:17,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:17,260 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:17,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-06-05 21:52:17,460 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:17,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1040049184, now seen corresponding path program 237 times [2021-06-05 21:52:17,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:17,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975136595] [2021-06-05 21:52:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:17,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975136595] [2021-06-05 21:52:17,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975136595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808591508] [2021-06-05 21:52:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:17,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:52:17,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:17,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:17,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808591508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:17,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:17,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:17,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970106397] [2021-06-05 21:52:17,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:17,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:17,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:17,968 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:18,608 INFO L93 Difference]: Finished difference Result 269 states and 557 transitions. [2021-06-05 21:52:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:52:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:18,608 INFO L225 Difference]: With dead ends: 269 [2021-06-05 21:52:18,608 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 21:52:18,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:52:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 21:52:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 197. [2021-06-05 21:52:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-05 21:52:18,610 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-05 21:52:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:18,611 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-05 21:52:18,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-05 21:52:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:18,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:18,611 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:18,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:18,811 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1577904762, now seen corresponding path program 238 times [2021-06-05 21:52:18,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:18,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103332473] [2021-06-05 21:52:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:18,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:18,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103332473] [2021-06-05 21:52:18,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103332473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:18,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43576316] [2021-06-05 21:52:18,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:18,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:18,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:19,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:19,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43576316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:19,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:19,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:19,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637218960] [2021-06-05 21:52:19,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:19,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:19,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:19,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:19,266 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:19,928 INFO L93 Difference]: Finished difference Result 264 states and 561 transitions. [2021-06-05 21:52:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:52:19,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:19,929 INFO L225 Difference]: With dead ends: 264 [2021-06-05 21:52:19,929 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:52:19,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:52:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:52:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 197. [2021-06-05 21:52:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-05 21:52:19,931 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-05 21:52:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:19,931 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-05 21:52:19,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-05 21:52:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:19,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:19,931 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:20,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1902,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:20,132 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1071558496, now seen corresponding path program 239 times [2021-06-05 21:52:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:20,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435503537] [2021-06-05 21:52:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:20,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:20,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435503537] [2021-06-05 21:52:20,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435503537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:20,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889130645] [2021-06-05 21:52:20,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:20,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:20,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:20,543 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:52:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:20,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889130645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:20,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:20,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:20,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671868522] [2021-06-05 21:52:20,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:20,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:20,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:20,729 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:21,310 INFO L93 Difference]: Finished difference Result 262 states and 553 transitions. [2021-06-05 21:52:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:52:21,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:21,311 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:52:21,311 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:52:21,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 785.9ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:52:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:52:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-06-05 21:52:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-05 21:52:21,313 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-05 21:52:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:21,313 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-05 21:52:21,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-05 21:52:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:21,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:21,313 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:21,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1912 [2021-06-05 21:52:21,513 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1107183336, now seen corresponding path program 240 times [2021-06-05 21:52:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389359446] [2021-06-05 21:52:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:21,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:21,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389359446] [2021-06-05 21:52:21,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389359446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:21,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100834868] [2021-06-05 21:52:21,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:21,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:52:21,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:21,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 21:52:21,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:22,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100834868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:22,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:22,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:22,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659884702] [2021-06-05 21:52:22,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:22,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:22,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:22,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:22,078 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:23,119 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-06-05 21:52:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:52:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:23,119 INFO L225 Difference]: With dead ends: 290 [2021-06-05 21:52:23,120 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:52:23,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1263.7ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:52:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:52:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 200. [2021-06-05 21:52:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-06-05 21:52:23,121 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-06-05 21:52:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:23,121 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-06-05 21:52:23,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-06-05 21:52:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:23,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:23,122 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:23,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1924,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:23,322 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash -310447584, now seen corresponding path program 241 times [2021-06-05 21:52:23,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:23,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554120141] [2021-06-05 21:52:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:23,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:23,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554120141] [2021-06-05 21:52:23,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554120141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:23,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458599112] [2021-06-05 21:52:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:23,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:23,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458599112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:23,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:23,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:23,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312187131] [2021-06-05 21:52:23,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:23,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:23,758 INFO L87 Difference]: Start difference. First operand 200 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:24,531 INFO L93 Difference]: Finished difference Result 244 states and 526 transitions. [2021-06-05 21:52:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:52:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:24,532 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:52:24,532 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:52:24,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 828.9ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:52:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:52:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2021-06-05 21:52:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-06-05 21:52:24,534 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-06-05 21:52:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:24,534 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-06-05 21:52:24,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-06-05 21:52:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:24,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:24,534 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:24,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:24,735 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash 195898682, now seen corresponding path program 242 times [2021-06-05 21:52:24,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:24,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239770276] [2021-06-05 21:52:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:24,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:24,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239770276] [2021-06-05 21:52:24,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239770276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:24,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153968932] [2021-06-05 21:52:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:24,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:24,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:24,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:25,173 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:52:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:25,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153968932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:25,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:25,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:25,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199101028] [2021-06-05 21:52:25,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:25,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:25,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:25,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:25,353 INFO L87 Difference]: Start difference. First operand 200 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:26,388 INFO L93 Difference]: Finished difference Result 260 states and 563 transitions. [2021-06-05 21:52:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:52:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:26,389 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:52:26,389 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:52:26,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1276.6ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:52:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:52:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 205. [2021-06-05 21:52:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2745098039215685) internal successors, (464), 204 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 464 transitions. [2021-06-05 21:52:26,391 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 464 transitions. Word has length 18 [2021-06-05 21:52:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:26,391 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 464 transitions. [2021-06-05 21:52:26,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 464 transitions. [2021-06-05 21:52:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:26,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:26,391 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:26,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1945 [2021-06-05 21:52:26,591 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1287236256, now seen corresponding path program 243 times [2021-06-05 21:52:26,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:26,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300579323] [2021-06-05 21:52:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:26,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300579323] [2021-06-05 21:52:26,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300579323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110852303] [2021-06-05 21:52:26,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:26,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:26,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:26,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:26,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:27,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110852303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:27,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:27,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:52:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801362844] [2021-06-05 21:52:27,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:52:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:52:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:27,233 INFO L87 Difference]: Start difference. First operand 205 states and 464 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:28,165 INFO L93 Difference]: Finished difference Result 280 states and 598 transitions. [2021-06-05 21:52:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:52:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:28,165 INFO L225 Difference]: With dead ends: 280 [2021-06-05 21:52:28,165 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:52:28,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1159.8ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:52:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:52:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2021-06-05 21:52:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.269230769230769) internal successors, (472), 208 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 472 transitions. [2021-06-05 21:52:28,167 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 472 transitions. Word has length 18 [2021-06-05 21:52:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:28,168 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 472 transitions. [2021-06-05 21:52:28,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 472 transitions. [2021-06-05 21:52:28,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:28,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:28,168 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:28,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:28,372 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -682872100, now seen corresponding path program 244 times [2021-06-05 21:52:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:28,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967157601] [2021-06-05 21:52:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:28,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:28,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967157601] [2021-06-05 21:52:28,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967157601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:28,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827807899] [2021-06-05 21:52:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:28,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:28,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:28,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827807899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:28,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:28,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:28,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932467781] [2021-06-05 21:52:28,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:28,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:28,939 INFO L87 Difference]: Start difference. First operand 209 states and 472 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:29,721 INFO L93 Difference]: Finished difference Result 314 states and 641 transitions. [2021-06-05 21:52:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:52:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:29,722 INFO L225 Difference]: With dead ends: 314 [2021-06-05 21:52:29,722 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 21:52:29,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 997.2ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:52:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 21:52:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 210. [2021-06-05 21:52:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.272727272727273) internal successors, (475), 209 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 475 transitions. [2021-06-05 21:52:29,724 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 475 transitions. Word has length 18 [2021-06-05 21:52:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:29,724 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 475 transitions. [2021-06-05 21:52:29,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 475 transitions. [2021-06-05 21:52:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:29,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:29,724 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:29,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-06-05 21:52:29,924 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash 113863652, now seen corresponding path program 245 times [2021-06-05 21:52:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:29,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675144377] [2021-06-05 21:52:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:30,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:30,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675144377] [2021-06-05 21:52:30,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675144377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:30,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373769651] [2021-06-05 21:52:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:30,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:30,365 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:52:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:30,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373769651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:30,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:30,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:30,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058954208] [2021-06-05 21:52:30,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:30,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:30,503 INFO L87 Difference]: Start difference. First operand 210 states and 475 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:31,005 INFO L93 Difference]: Finished difference Result 298 states and 626 transitions. [2021-06-05 21:52:31,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:52:31,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:31,006 INFO L225 Difference]: With dead ends: 298 [2021-06-05 21:52:31,006 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 21:52:31,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:52:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 21:52:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2021-06-05 21:52:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2701421800947865) internal successors, (479), 211 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 479 transitions. [2021-06-05 21:52:31,008 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 479 transitions. Word has length 18 [2021-06-05 21:52:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:31,008 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 479 transitions. [2021-06-05 21:52:31,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 479 transitions. [2021-06-05 21:52:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:31,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:31,009 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:31,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1981,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:31,209 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash 620209918, now seen corresponding path program 246 times [2021-06-05 21:52:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:31,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326458524] [2021-06-05 21:52:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:31,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:31,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326458524] [2021-06-05 21:52:31,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326458524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:31,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487982218] [2021-06-05 21:52:31,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:31,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:52:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:52:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:31,587 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:52:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:31,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487982218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:31,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:31,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:52:31,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863602284] [2021-06-05 21:52:31,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:52:31,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:52:31,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:31,782 INFO L87 Difference]: Start difference. First operand 212 states and 479 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:32,440 INFO L93 Difference]: Finished difference Result 289 states and 611 transitions. [2021-06-05 21:52:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:32,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:32,441 INFO L225 Difference]: With dead ends: 289 [2021-06-05 21:52:32,441 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 21:52:32,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:52:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 21:52:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-06-05 21:52:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-06-05 21:52:32,443 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-06-05 21:52:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:32,443 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-06-05 21:52:32,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-06-05 21:52:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:32,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:32,443 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:32,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-06-05 21:52:32,644 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash -862925020, now seen corresponding path program 247 times [2021-06-05 21:52:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:32,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708420239] [2021-06-05 21:52:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:32,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:32,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708420239] [2021-06-05 21:52:32,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708420239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:32,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139646583] [2021-06-05 21:52:32,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139646583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:33,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:33,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:52:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719055924] [2021-06-05 21:52:33,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:52:33,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:33,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:52:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:33,234 INFO L87 Difference]: Start difference. First operand 213 states and 481 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:34,496 INFO L93 Difference]: Finished difference Result 327 states and 687 transitions. [2021-06-05 21:52:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:52:34,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:34,497 INFO L225 Difference]: With dead ends: 327 [2021-06-05 21:52:34,497 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 21:52:34,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1403.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:52:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 21:52:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 213. [2021-06-05 21:52:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-06-05 21:52:34,499 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-06-05 21:52:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:34,499 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-06-05 21:52:34,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-06-05 21:52:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:34,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:34,499 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:34,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:34,700 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash -17953568, now seen corresponding path program 248 times [2021-06-05 21:52:34,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:34,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360314078] [2021-06-05 21:52:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:34,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:34,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360314078] [2021-06-05 21:52:34,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360314078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:34,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389648500] [2021-06-05 21:52:34,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:34,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:34,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:52:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389648500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:35,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:35,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 21:52:35,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277210332] [2021-06-05 21:52:35,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:52:35,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:35,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:52:35,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:35,223 INFO L87 Difference]: Start difference. First operand 213 states and 481 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:35,916 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 21:52:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:36,775 INFO L93 Difference]: Finished difference Result 333 states and 693 transitions. [2021-06-05 21:52:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:52:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:36,776 INFO L225 Difference]: With dead ends: 333 [2021-06-05 21:52:36,776 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 21:52:36,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1615.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:52:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 21:52:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 215. [2021-06-05 21:52:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-06-05 21:52:36,778 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 18 [2021-06-05 21:52:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:36,778 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-06-05 21:52:36,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-06-05 21:52:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:36,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:36,779 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:36,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2015 [2021-06-05 21:52:36,994 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1401880791, now seen corresponding path program 249 times [2021-06-05 21:52:36,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:36,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143801947] [2021-06-05 21:52:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:37,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:37,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143801947] [2021-06-05 21:52:37,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143801947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:37,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576735814] [2021-06-05 21:52:37,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:37,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:37,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:37,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:52:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:37,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576735814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:37,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:37,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:37,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301728023] [2021-06-05 21:52:37,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:37,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:37,318 INFO L87 Difference]: Start difference. First operand 215 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:37,599 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-06-05 21:52:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:52:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:37,600 INFO L225 Difference]: With dead ends: 278 [2021-06-05 21:52:37,600 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 21:52:37,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:52:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 21:52:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2021-06-05 21:52:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-06-05 21:52:37,602 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-06-05 21:52:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:37,602 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-06-05 21:52:37,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-06-05 21:52:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:37,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:37,603 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:37,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-06-05 21:52:37,813 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash 357408349, now seen corresponding path program 250 times [2021-06-05 21:52:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:37,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219962919] [2021-06-05 21:52:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:37,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:37,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219962919] [2021-06-05 21:52:37,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219962919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:37,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900736149] [2021-06-05 21:52:37,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:37,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:37,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:38,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900736149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:38,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:38,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:38,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480617560] [2021-06-05 21:52:38,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:38,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:38,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:38,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:38,116 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:38,606 INFO L93 Difference]: Finished difference Result 289 states and 622 transitions. [2021-06-05 21:52:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:38,607 INFO L225 Difference]: With dead ends: 289 [2021-06-05 21:52:38,607 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 21:52:38,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 542.0ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:52:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 21:52:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 218. [2021-06-05 21:52:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-06-05 21:52:38,609 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-06-05 21:52:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:38,609 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-06-05 21:52:38,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-06-05 21:52:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:38,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:38,609 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:38,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-06-05 21:52:38,810 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1516287333, now seen corresponding path program 251 times [2021-06-05 21:52:38,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:38,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759346807] [2021-06-05 21:52:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:38,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:38,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759346807] [2021-06-05 21:52:38,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759346807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:38,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430532178] [2021-06-05 21:52:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:38,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:38,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:39,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430532178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:39,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:39,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:39,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902250858] [2021-06-05 21:52:39,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:39,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:39,122 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:39,690 INFO L93 Difference]: Finished difference Result 286 states and 616 transitions. [2021-06-05 21:52:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:52:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:39,690 INFO L225 Difference]: With dead ends: 286 [2021-06-05 21:52:39,690 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 21:52:39,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 618.7ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:52:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 21:52:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 218. [2021-06-05 21:52:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-06-05 21:52:39,693 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-06-05 21:52:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:39,693 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-06-05 21:52:39,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-06-05 21:52:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:39,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:39,693 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:39,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-06-05 21:52:39,893 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:39,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash 445291869, now seen corresponding path program 252 times [2021-06-05 21:52:39,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:39,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923622836] [2021-06-05 21:52:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:39,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923622836] [2021-06-05 21:52:39,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923622836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222751758] [2021-06-05 21:52:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:40,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:40,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222751758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:40,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:40,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:40,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422854713] [2021-06-05 21:52:40,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:40,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:40,230 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:40,830 INFO L93 Difference]: Finished difference Result 284 states and 612 transitions. [2021-06-05 21:52:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:52:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:40,830 INFO L225 Difference]: With dead ends: 284 [2021-06-05 21:52:40,830 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 21:52:40,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 644.7ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:52:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 21:52:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2021-06-05 21:52:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-06-05 21:52:40,832 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-06-05 21:52:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:40,832 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-06-05 21:52:40,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-06-05 21:52:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:40,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:40,833 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:41,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-06-05 21:52:41,033 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1242027621, now seen corresponding path program 253 times [2021-06-05 21:52:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:41,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129216495] [2021-06-05 21:52:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:41,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:41,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129216495] [2021-06-05 21:52:41,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129216495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:41,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796645314] [2021-06-05 21:52:41,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:41,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796645314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:41,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:41,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:41,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973804534] [2021-06-05 21:52:41,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:41,370 INFO L87 Difference]: Start difference. First operand 219 states and 493 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:42,036 INFO L93 Difference]: Finished difference Result 285 states and 611 transitions. [2021-06-05 21:52:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:52:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:42,037 INFO L225 Difference]: With dead ends: 285 [2021-06-05 21:52:42,037 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 21:52:42,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:52:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 21:52:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2021-06-05 21:52:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:52:42,039 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:52:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:42,039 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:52:42,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:52:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:42,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:42,039 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:42,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:42,240 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1925543582, now seen corresponding path program 254 times [2021-06-05 21:52:42,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:42,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524950722] [2021-06-05 21:52:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:42,335 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 21:52:42,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:42,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524950722] [2021-06-05 21:52:42,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524950722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:42,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156325813] [2021-06-05 21:52:42,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:42,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:42,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:42,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156325813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:42,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:42,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:42,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211042079] [2021-06-05 21:52:42,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:42,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:42,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:42,613 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:43,108 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-06-05 21:52:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:43,108 INFO L225 Difference]: With dead ends: 267 [2021-06-05 21:52:43,108 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 21:52:43,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 645.4ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:52:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 21:52:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 220. [2021-06-05 21:52:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:52:43,110 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:52:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:43,110 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:52:43,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:52:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:43,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:43,111 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:43,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:43,311 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:43,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1418186439, now seen corresponding path program 255 times [2021-06-05 21:52:43,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:43,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602379943] [2021-06-05 21:52:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:43,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:43,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602379943] [2021-06-05 21:52:43,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602379943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:43,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181121722] [2021-06-05 21:52:43,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:43,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:43,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:52:43,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:43,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181121722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:43,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:43,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:43,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864853404] [2021-06-05 21:52:43,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:43,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:43,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:43,606 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:43,951 INFO L93 Difference]: Finished difference Result 252 states and 555 transitions. [2021-06-05 21:52:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:52:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:43,951 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:52:43,951 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:52:43,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:52:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:52:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 220. [2021-06-05 21:52:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:52:43,953 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:52:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:43,953 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:52:43,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:52:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:43,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:43,954 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:44,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:44,154 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1717901873, now seen corresponding path program 256 times [2021-06-05 21:52:44,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:44,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416900919] [2021-06-05 21:52:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:44,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416900919] [2021-06-05 21:52:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416900919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909560950] [2021-06-05 21:52:44,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:44,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:44,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909560950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:44,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:44,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:44,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688279909] [2021-06-05 21:52:44,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:44,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:44,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:44,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:44,479 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:44,815 INFO L93 Difference]: Finished difference Result 264 states and 579 transitions. [2021-06-05 21:52:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:44,815 INFO L225 Difference]: With dead ends: 264 [2021-06-05 21:52:44,815 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 21:52:44,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 401.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:52:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 21:52:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 220. [2021-06-05 21:52:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:52:44,817 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:52:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:44,817 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:52:44,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:52:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:44,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:44,818 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:45,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2064 [2021-06-05 21:52:45,024 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1506069959, now seen corresponding path program 257 times [2021-06-05 21:52:45,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:45,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102536081] [2021-06-05 21:52:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:45,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:45,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102536081] [2021-06-05 21:52:45,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102536081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:45,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316288955] [2021-06-05 21:52:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:52:45,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:45,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:45,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:45,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316288955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:45,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:45,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:45,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105115914] [2021-06-05 21:52:45,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:45,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:45,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:45,343 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:45,658 INFO L93 Difference]: Finished difference Result 261 states and 573 transitions. [2021-06-05 21:52:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:45,659 INFO L225 Difference]: With dead ends: 261 [2021-06-05 21:52:45,659 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:52:45,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:52:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:52:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-06-05 21:52:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:52:45,661 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:52:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:45,661 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:52:45,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:52:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:45,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:45,661 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:45,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-06-05 21:52:45,864 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1992161585, now seen corresponding path program 258 times [2021-06-05 21:52:45,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:45,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759961231] [2021-06-05 21:52:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:45,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:45,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759961231] [2021-06-05 21:52:45,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759961231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:45,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432558345] [2021-06-05 21:52:45,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:45,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:46,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432558345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:46,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:46,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:46,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267350157] [2021-06-05 21:52:46,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:46,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:46,175 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:46,528 INFO L93 Difference]: Finished difference Result 258 states and 567 transitions. [2021-06-05 21:52:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:52:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:46,529 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:52:46,529 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 21:52:46,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:52:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 21:52:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 220. [2021-06-05 21:52:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:52:46,531 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:52:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:46,531 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:52:46,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:52:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:46,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:46,532 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:46,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:46,732 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1704611350, now seen corresponding path program 259 times [2021-06-05 21:52:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:46,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121145206] [2021-06-05 21:52:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:46,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121145206] [2021-06-05 21:52:46,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121145206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745068466] [2021-06-05 21:52:46,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:47,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745068466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:47,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:47,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:47,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758317581] [2021-06-05 21:52:47,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:47,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:47,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:47,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:47,095 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:47,358 INFO L93 Difference]: Finished difference Result 243 states and 539 transitions. [2021-06-05 21:52:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:47,359 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:52:47,359 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 21:52:47,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:52:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 21:52:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2021-06-05 21:52:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-05 21:52:47,361 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-05 21:52:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:47,361 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-05 21:52:47,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-05 21:52:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:47,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:47,361 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:47,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:47,561 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash -450444695, now seen corresponding path program 260 times [2021-06-05 21:52:47,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:47,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620982734] [2021-06-05 21:52:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:47,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:47,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620982734] [2021-06-05 21:52:47,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620982734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:47,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901998368] [2021-06-05 21:52:47,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:47,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:47,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:47,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901998368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:47,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:47,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:47,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364395695] [2021-06-05 21:52:47,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:47,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:47,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:47,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:47,865 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:48,066 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-06-05 21:52:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:52:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:48,067 INFO L225 Difference]: With dead ends: 254 [2021-06-05 21:52:48,067 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 21:52:48,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 21:52:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2021-06-05 21:52:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-06-05 21:52:48,069 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-06-05 21:52:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:48,069 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-06-05 21:52:48,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-06-05 21:52:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:48,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:48,070 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:48,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-06-05 21:52:48,270 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1521440159, now seen corresponding path program 261 times [2021-06-05 21:52:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:48,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372119097] [2021-06-05 21:52:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:48,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372119097] [2021-06-05 21:52:48,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372119097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809012705] [2021-06-05 21:52:48,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:48,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:48,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:48,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809012705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:48,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:48,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:48,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509065399] [2021-06-05 21:52:48,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:48,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:48,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:48,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:48,572 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:49,040 INFO L93 Difference]: Finished difference Result 266 states and 581 transitions. [2021-06-05 21:52:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:52:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:49,041 INFO L225 Difference]: With dead ends: 266 [2021-06-05 21:52:49,041 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 21:52:49,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:52:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 21:52:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 219. [2021-06-05 21:52:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-06-05 21:52:49,043 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-06-05 21:52:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:49,043 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-06-05 21:52:49,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-06-05 21:52:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:49,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:49,043 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:49,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2094,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:49,244 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:49,244 INFO L82 PathProgramCache]: Analyzing trace with hash -724704407, now seen corresponding path program 262 times [2021-06-05 21:52:49,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:49,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093841399] [2021-06-05 21:52:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:49,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093841399] [2021-06-05 21:52:49,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093841399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592210581] [2021-06-05 21:52:49,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:49,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:49,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:49,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:49,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592210581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:49,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:49,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:49,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513197825] [2021-06-05 21:52:49,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:49,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:49,545 INFO L87 Difference]: Start difference. First operand 219 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:49,775 INFO L93 Difference]: Finished difference Result 260 states and 571 transitions. [2021-06-05 21:52:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:52:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:49,776 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:52:49,776 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 21:52:49,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 21:52:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 221. [2021-06-05 21:52:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2590909090909093) internal successors, (497), 220 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 497 transitions. [2021-06-05 21:52:49,778 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 497 transitions. Word has length 19 [2021-06-05 21:52:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:49,778 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 497 transitions. [2021-06-05 21:52:49,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 497 transitions. [2021-06-05 21:52:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:49,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:49,778 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:49,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:49,985 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash -437154172, now seen corresponding path program 263 times [2021-06-05 21:52:49,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:49,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361056742] [2021-06-05 21:52:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:50,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:50,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361056742] [2021-06-05 21:52:50,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361056742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:50,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931631486] [2021-06-05 21:52:50,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:50,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:50,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:50,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:50,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931631486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:50,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:50,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:50,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261147774] [2021-06-05 21:52:50,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:50,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:50,326 INFO L87 Difference]: Start difference. First operand 221 states and 497 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:50,611 INFO L93 Difference]: Finished difference Result 252 states and 556 transitions. [2021-06-05 21:52:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:52:50,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:50,612 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:52:50,612 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:52:50,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:52:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:52:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2021-06-05 21:52:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-06-05 21:52:50,614 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-06-05 21:52:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:50,614 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-06-05 21:52:50,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-06-05 21:52:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:50,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:50,614 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:50,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2106 [2021-06-05 21:52:50,829 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1290392199, now seen corresponding path program 264 times [2021-06-05 21:52:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:50,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490275048] [2021-06-05 21:52:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:50,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:50,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490275048] [2021-06-05 21:52:50,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490275048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:50,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125666805] [2021-06-05 21:52:50,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:50,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:50,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:50,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:51,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125666805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:51,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:51,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:51,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464819349] [2021-06-05 21:52:51,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:51,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:51,146 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:51,447 INFO L93 Difference]: Finished difference Result 255 states and 559 transitions. [2021-06-05 21:52:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:52:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:51,448 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:52:51,448 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:52:51,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:52:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:52:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-06-05 21:52:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2522935779816513) internal successors, (491), 218 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 491 transitions. [2021-06-05 21:52:51,450 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 491 transitions. Word has length 19 [2021-06-05 21:52:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:51,450 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 491 transitions. [2021-06-05 21:52:51,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 491 transitions. [2021-06-05 21:52:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:51,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:51,450 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:51,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2114 [2021-06-05 21:52:51,651 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2087127951, now seen corresponding path program 265 times [2021-06-05 21:52:51,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:51,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021168441] [2021-06-05 21:52:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:51,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021168441] [2021-06-05 21:52:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021168441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560627461] [2021-06-05 21:52:51,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:51,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:51,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560627461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:51,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:51,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:51,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761251957] [2021-06-05 21:52:51,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:51,967 INFO L87 Difference]: Start difference. First operand 219 states and 491 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:52,301 INFO L93 Difference]: Finished difference Result 261 states and 571 transitions. [2021-06-05 21:52:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:52:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:52,302 INFO L225 Difference]: With dead ends: 261 [2021-06-05 21:52:52,302 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:52:52,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:52:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:52:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-06-05 21:52:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2511415525114153) internal successors, (493), 219 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 493 transitions. [2021-06-05 21:52:52,304 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 493 transitions. Word has length 19 [2021-06-05 21:52:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:52,304 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 493 transitions. [2021-06-05 21:52:52,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 493 transitions. [2021-06-05 21:52:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:52,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:52,305 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:52,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2119 [2021-06-05 21:52:52,505 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:52,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1920289110, now seen corresponding path program 266 times [2021-06-05 21:52:52,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:52,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334206039] [2021-06-05 21:52:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:52,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334206039] [2021-06-05 21:52:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334206039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662733326] [2021-06-05 21:52:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:52,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:52,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662733326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:52,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:52,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531980427] [2021-06-05 21:52:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:52,850 INFO L87 Difference]: Start difference. First operand 220 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:53,245 INFO L93 Difference]: Finished difference Result 256 states and 561 transitions. [2021-06-05 21:52:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:52:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:53,246 INFO L225 Difference]: With dead ends: 256 [2021-06-05 21:52:53,246 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 21:52:53,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:52:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 21:52:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 218. [2021-06-05 21:52:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2534562211981566) internal successors, (489), 217 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 489 transitions. [2021-06-05 21:52:53,248 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 489 transitions. Word has length 19 [2021-06-05 21:52:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:53,248 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 489 transitions. [2021-06-05 21:52:53,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 489 transitions. [2021-06-05 21:52:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:53,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:53,248 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:53,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:53,449 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1701493079, now seen corresponding path program 267 times [2021-06-05 21:52:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:53,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394157413] [2021-06-05 21:52:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:53,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:53,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394157413] [2021-06-05 21:52:53,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394157413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:53,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638842450] [2021-06-05 21:52:53,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:53,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:53,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:53,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638842450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:53,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:53,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:53,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260034330] [2021-06-05 21:52:53,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:53,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:53,849 INFO L87 Difference]: Start difference. First operand 218 states and 489 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:54,464 INFO L93 Difference]: Finished difference Result 285 states and 602 transitions. [2021-06-05 21:52:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:52:54,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:54,464 INFO L225 Difference]: With dead ends: 285 [2021-06-05 21:52:54,464 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 21:52:54,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 743.0ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:52:54,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 21:52:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-06-05 21:52:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.234782608695652) internal successors, (514), 230 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 514 transitions. [2021-06-05 21:52:54,467 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 514 transitions. Word has length 19 [2021-06-05 21:52:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:54,467 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 514 transitions. [2021-06-05 21:52:54,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 514 transitions. [2021-06-05 21:52:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:54,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:54,467 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:54,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2134 [2021-06-05 21:52:54,667 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1413942844, now seen corresponding path program 268 times [2021-06-05 21:52:54,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:54,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787626377] [2021-06-05 21:52:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:54,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:54,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787626377] [2021-06-05 21:52:54,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787626377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499834975] [2021-06-05 21:52:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:54,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:54,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499834975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:54,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:54,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:54,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787491144] [2021-06-05 21:52:54,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:54,985 INFO L87 Difference]: Start difference. First operand 231 states and 514 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:55,519 INFO L93 Difference]: Finished difference Result 337 states and 704 transitions. [2021-06-05 21:52:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:52:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:55,520 INFO L225 Difference]: With dead ends: 337 [2021-06-05 21:52:55,520 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 21:52:55,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:52:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 21:52:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 232. [2021-06-05 21:52:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.2467532467532467) internal successors, (519), 231 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 519 transitions. [2021-06-05 21:52:55,522 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 519 transitions. Word has length 19 [2021-06-05 21:52:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:55,522 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 519 transitions. [2021-06-05 21:52:55,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 519 transitions. [2021-06-05 21:52:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:55,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:55,523 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:55,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2142,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:55,723 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash 920989127, now seen corresponding path program 269 times [2021-06-05 21:52:55,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:55,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126805049] [2021-06-05 21:52:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:55,836 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 21:52:55,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:55,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126805049] [2021-06-05 21:52:55,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126805049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:55,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082123064] [2021-06-05 21:52:55,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:55,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:52:55,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:55,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:56,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082123064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:56,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:56,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:56,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040613318] [2021-06-05 21:52:56,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:56,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:56,111 INFO L87 Difference]: Start difference. First operand 232 states and 519 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:56,414 INFO L93 Difference]: Finished difference Result 253 states and 555 transitions. [2021-06-05 21:52:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:52:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:56,415 INFO L225 Difference]: With dead ends: 253 [2021-06-05 21:52:56,415 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:52:56,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:52:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:52:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 223. [2021-06-05 21:52:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.265765765765766) internal successors, (503), 222 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 503 transitions. [2021-06-05 21:52:56,417 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 503 transitions. Word has length 19 [2021-06-05 21:52:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:56,417 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 503 transitions. [2021-06-05 21:52:56,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 503 transitions. [2021-06-05 21:52:56,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:56,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:56,417 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:56,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:56,617 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:56,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:56,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1111952564, now seen corresponding path program 270 times [2021-06-05 21:52:56,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:56,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134939019] [2021-06-05 21:52:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:56,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:56,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134939019] [2021-06-05 21:52:56,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134939019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:56,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775289474] [2021-06-05 21:52:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:56,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:52:56,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:56,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775289474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:56,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:56,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:52:56,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022374436] [2021-06-05 21:52:56,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:56,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:56,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:56,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:56,957 INFO L87 Difference]: Start difference. First operand 223 states and 503 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:57,347 INFO L93 Difference]: Finished difference Result 279 states and 607 transitions. [2021-06-05 21:52:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:52:57,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:57,347 INFO L225 Difference]: With dead ends: 279 [2021-06-05 21:52:57,347 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 21:52:57,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:52:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 21:52:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 221. [2021-06-05 21:52:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-06-05 21:52:57,349 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-06-05 21:52:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:57,349 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-06-05 21:52:57,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-06-05 21:52:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:57,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:57,350 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:57,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-06-05 21:52:57,550 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:57,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:57,550 INFO L82 PathProgramCache]: Analyzing trace with hash -57431139, now seen corresponding path program 271 times [2021-06-05 21:52:57,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:57,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36610884] [2021-06-05 21:52:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:57,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:57,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36610884] [2021-06-05 21:52:57,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36610884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:57,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024309960] [2021-06-05 21:52:57,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:52:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:57,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024309960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:57,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:57,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:57,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083141809] [2021-06-05 21:52:57,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:57,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:57,848 INFO L87 Difference]: Start difference. First operand 221 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:58,158 INFO L93 Difference]: Finished difference Result 247 states and 546 transitions. [2021-06-05 21:52:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:58,159 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:52:58,159 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:52:58,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:52:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:52:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-06-05 21:52:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.253393665158371) internal successors, (498), 221 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 498 transitions. [2021-06-05 21:52:58,161 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 498 transitions. Word has length 19 [2021-06-05 21:52:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:58,161 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 498 transitions. [2021-06-05 21:52:58,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 498 transitions. [2021-06-05 21:52:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:58,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:58,161 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:58,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:58,362 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:58,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1101447845, now seen corresponding path program 272 times [2021-06-05 21:52:58,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:58,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2584495] [2021-06-05 21:52:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:58,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:58,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2584495] [2021-06-05 21:52:58,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2584495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:58,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675883015] [2021-06-05 21:52:58,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:58,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:58,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:52:58,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:58,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675883015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:58,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:58,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:52:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53894983] [2021-06-05 21:52:58,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:58,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:58,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:58,739 INFO L87 Difference]: Start difference. First operand 222 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:59,339 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2021-06-05 21:52:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:52:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:52:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:59,340 INFO L225 Difference]: With dead ends: 261 [2021-06-05 21:52:59,340 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:52:59,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:52:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:52:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-06-05 21:52:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2522522522522523) internal successors, (500), 222 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 500 transitions. [2021-06-05 21:52:59,342 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 500 transitions. Word has length 19 [2021-06-05 21:52:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:59,342 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 500 transitions. [2021-06-05 21:52:59,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 500 transitions. [2021-06-05 21:52:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:52:59,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:59,343 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:59,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-06-05 21:52:59,543 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:59,543 INFO L82 PathProgramCache]: Analyzing trace with hash 30452381, now seen corresponding path program 273 times [2021-06-05 21:52:59,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:59,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103004645] [2021-06-05 21:52:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:59,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103004645] [2021-06-05 21:52:59,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103004645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645838649] [2021-06-05 21:52:59,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:59,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 21:52:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:00,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645838649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:00,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:00,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 21:53:00,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672195442] [2021-06-05 21:53:00,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:00,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:00,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:00,049 INFO L87 Difference]: Start difference. First operand 223 states and 500 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:00,721 INFO L93 Difference]: Finished difference Result 270 states and 592 transitions. [2021-06-05 21:53:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:53:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:00,722 INFO L225 Difference]: With dead ends: 270 [2021-06-05 21:53:00,722 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 21:53:00,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:53:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 21:53:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 224. [2021-06-05 21:53:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2511210762331837) internal successors, (502), 223 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 502 transitions. [2021-06-05 21:53:00,724 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 502 transitions. Word has length 19 [2021-06-05 21:53:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:00,724 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 502 transitions. [2021-06-05 21:53:00,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 502 transitions. [2021-06-05 21:53:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:00,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:00,724 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:00,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:00,925 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 827188133, now seen corresponding path program 274 times [2021-06-05 21:53:00,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:00,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277861957] [2021-06-05 21:53:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:01,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277861957] [2021-06-05 21:53:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277861957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145155331] [2021-06-05 21:53:01,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:01,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:01,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145155331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:01,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:01,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:01,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49695670] [2021-06-05 21:53:01,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:01,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:01,249 INFO L87 Difference]: Start difference. First operand 224 states and 502 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:02,035 INFO L93 Difference]: Finished difference Result 294 states and 627 transitions. [2021-06-05 21:53:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:53:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:02,036 INFO L225 Difference]: With dead ends: 294 [2021-06-05 21:53:02,036 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 21:53:02,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:53:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 21:53:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-06-05 21:53:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2589285714285716) internal successors, (506), 224 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 506 transitions. [2021-06-05 21:53:02,038 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 506 transitions. Word has length 19 [2021-06-05 21:53:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:02,038 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 506 transitions. [2021-06-05 21:53:02,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 506 transitions. [2021-06-05 21:53:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:02,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:02,038 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:02,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-06-05 21:53:02,239 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1303499579, now seen corresponding path program 275 times [2021-06-05 21:53:02,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:02,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068639874] [2021-06-05 21:53:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:02,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:02,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068639874] [2021-06-05 21:53:02,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068639874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:02,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581890580] [2021-06-05 21:53:02,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:02,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:53:02,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:02,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:02,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:02,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581890580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:02,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:02,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:02,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944949121] [2021-06-05 21:53:02,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:02,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:02,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:02,559 INFO L87 Difference]: Start difference. First operand 225 states and 506 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:03,123 INFO L93 Difference]: Finished difference Result 261 states and 570 transitions. [2021-06-05 21:53:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:03,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:03,123 INFO L225 Difference]: With dead ends: 261 [2021-06-05 21:53:03,123 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 21:53:03,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:53:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 21:53:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 225. [2021-06-05 21:53:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2544642857142856) internal successors, (505), 224 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 505 transitions. [2021-06-05 21:53:03,125 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 505 transitions. Word has length 19 [2021-06-05 21:53:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:03,126 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 505 transitions. [2021-06-05 21:53:03,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 505 transitions. [2021-06-05 21:53:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:03,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:03,126 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:03,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2184 [2021-06-05 21:53:03,326 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:03,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:03,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1954584226, now seen corresponding path program 276 times [2021-06-05 21:53:03,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:03,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627486188] [2021-06-05 21:53:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:03,418 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 21:53:03,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:03,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627486188] [2021-06-05 21:53:03,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627486188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:03,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389650706] [2021-06-05 21:53:03,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:03,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:03,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:03,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:03,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389650706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:03,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:03,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:03,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692711790] [2021-06-05 21:53:03,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:03,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:03,693 INFO L87 Difference]: Start difference. First operand 225 states and 505 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:04,003 INFO L93 Difference]: Finished difference Result 245 states and 540 transitions. [2021-06-05 21:53:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:04,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:04,004 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:53:04,004 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 21:53:04,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 21:53:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-06-05 21:53:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-06-05 21:53:04,006 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-06-05 21:53:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:04,006 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-06-05 21:53:04,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-06-05 21:53:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:04,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:04,006 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:04,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:04,207 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1926062273, now seen corresponding path program 277 times [2021-06-05 21:53:04,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:04,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850056518] [2021-06-05 21:53:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:04,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:04,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850056518] [2021-06-05 21:53:04,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850056518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:04,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115479820] [2021-06-05 21:53:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:04,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:04,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:04,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115479820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:04,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:04,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:04,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334469937] [2021-06-05 21:53:04,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:04,514 INFO L87 Difference]: Start difference. First operand 221 states and 496 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:04,700 INFO L93 Difference]: Finished difference Result 256 states and 562 transitions. [2021-06-05 21:53:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:04,701 INFO L225 Difference]: With dead ends: 256 [2021-06-05 21:53:04,701 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 21:53:04,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 21:53:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 219. [2021-06-05 21:53:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2477064220183487) internal successors, (490), 218 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 490 transitions. [2021-06-05 21:53:04,703 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 490 transitions. Word has length 19 [2021-06-05 21:53:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:04,703 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 490 transitions. [2021-06-05 21:53:04,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 490 transitions. [2021-06-05 21:53:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:04,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:04,703 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:04,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-06-05 21:53:04,919 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2094645311, now seen corresponding path program 278 times [2021-06-05 21:53:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:04,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804521011] [2021-06-05 21:53:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:05,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804521011] [2021-06-05 21:53:05,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804521011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12384745] [2021-06-05 21:53:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:05,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:05,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:05,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12384745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:05,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:05,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:05,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327434555] [2021-06-05 21:53:05,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:05,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:05,230 INFO L87 Difference]: Start difference. First operand 219 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:05,650 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-06-05 21:53:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:05,650 INFO L225 Difference]: With dead ends: 263 [2021-06-05 21:53:05,650 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 21:53:05,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 21:53:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 216. [2021-06-05 21:53:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2511627906976743) internal successors, (484), 215 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 484 transitions. [2021-06-05 21:53:05,652 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 484 transitions. Word has length 19 [2021-06-05 21:53:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:05,652 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 484 transitions. [2021-06-05 21:53:05,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 484 transitions. [2021-06-05 21:53:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:05,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:05,653 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:05,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:05,853 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash -554628451, now seen corresponding path program 279 times [2021-06-05 21:53:05,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:05,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441690722] [2021-06-05 21:53:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:05,974 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 21:53:05,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441690722] [2021-06-05 21:53:05,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441690722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843896579] [2021-06-05 21:53:05,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:06,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:53:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:06,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843896579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:06,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:06,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:06,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910215349] [2021-06-05 21:53:06,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:06,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:06,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:06,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:06,242 INFO L87 Difference]: Start difference. First operand 216 states and 484 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:06,509 INFO L93 Difference]: Finished difference Result 240 states and 525 transitions. [2021-06-05 21:53:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:06,509 INFO L225 Difference]: With dead ends: 240 [2021-06-05 21:53:06,509 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:53:06,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:53:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2021-06-05 21:53:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-06-05 21:53:06,511 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-06-05 21:53:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:06,511 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-06-05 21:53:06,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-06-05 21:53:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:06,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:06,511 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:06,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-05 21:53:06,712 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1289595419, now seen corresponding path program 280 times [2021-06-05 21:53:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:06,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845052827] [2021-06-05 21:53:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:06,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845052827] [2021-06-05 21:53:06,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845052827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195067537] [2021-06-05 21:53:06,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:06,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:06,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:06,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:07,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195067537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:07,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:07,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:07,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844135452] [2021-06-05 21:53:07,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:07,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:07,028 INFO L87 Difference]: Start difference. First operand 212 states and 475 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:07,155 INFO L93 Difference]: Finished difference Result 245 states and 539 transitions. [2021-06-05 21:53:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:07,155 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:53:07,155 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:53:07,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:53:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-06-05 21:53:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.25) internal successors, (477), 212 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 477 transitions. [2021-06-05 21:53:07,157 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 477 transitions. Word has length 19 [2021-06-05 21:53:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:07,157 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 477 transitions. [2021-06-05 21:53:07,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 477 transitions. [2021-06-05 21:53:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:07,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:07,158 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:07,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:07,358 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1934376413, now seen corresponding path program 281 times [2021-06-05 21:53:07,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:07,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253727133] [2021-06-05 21:53:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:07,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:07,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253727133] [2021-06-05 21:53:07,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253727133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:07,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033492037] [2021-06-05 21:53:07,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:07,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:07,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:07,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033492037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:07,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:07,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:07,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956311876] [2021-06-05 21:53:07,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:07,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:07,671 INFO L87 Difference]: Start difference. First operand 213 states and 477 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:08,040 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2021-06-05 21:53:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:08,040 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:53:08,040 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 21:53:08,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 21:53:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2021-06-05 21:53:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.248826291079812) internal successors, (479), 213 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 479 transitions. [2021-06-05 21:53:08,042 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 479 transitions. Word has length 19 [2021-06-05 21:53:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:08,043 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 479 transitions. [2021-06-05 21:53:08,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 479 transitions. [2021-06-05 21:53:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:08,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:08,043 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:08,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-06-05 21:53:08,243 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:08,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1563855131, now seen corresponding path program 282 times [2021-06-05 21:53:08,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:08,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642842526] [2021-06-05 21:53:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:08,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642842526] [2021-06-05 21:53:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642842526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716734917] [2021-06-05 21:53:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:53:08,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:08,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:08,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:08,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716734917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:08,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:08,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:08,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115132012] [2021-06-05 21:53:08,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:08,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:08,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:08,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:08,553 INFO L87 Difference]: Start difference. First operand 214 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:09,071 INFO L93 Difference]: Finished difference Result 283 states and 608 transitions. [2021-06-05 21:53:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:53:09,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:09,072 INFO L225 Difference]: With dead ends: 283 [2021-06-05 21:53:09,072 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 21:53:09,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:53:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 21:53:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 215. [2021-06-05 21:53:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-05 21:53:09,074 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-05 21:53:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:09,074 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-05 21:53:09,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-05 21:53:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:09,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:09,075 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:09,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:09,275 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash -436459038, now seen corresponding path program 283 times [2021-06-05 21:53:09,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:09,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166929441] [2021-06-05 21:53:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:09,370 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 21:53:09,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166929441] [2021-06-05 21:53:09,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166929441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726097421] [2021-06-05 21:53:09,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:09,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:09,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726097421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:09,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:09,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:09,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107659854] [2021-06-05 21:53:09,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:09,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:09,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:09,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:09,624 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:09,884 INFO L93 Difference]: Finished difference Result 260 states and 562 transitions. [2021-06-05 21:53:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:09,885 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:53:09,885 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 21:53:09,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 21:53:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2021-06-05 21:53:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-05 21:53:09,887 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-05 21:53:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:09,887 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-05 21:53:09,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-05 21:53:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:09,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:09,887 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:10,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2237,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:10,089 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash 451241475, now seen corresponding path program 284 times [2021-06-05 21:53:10,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:10,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658669746] [2021-06-05 21:53:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:10,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:10,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658669746] [2021-06-05 21:53:10,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658669746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:10,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010276736] [2021-06-05 21:53:10,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:10,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:10,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:10,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010276736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:10,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:10,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:10,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877346714] [2021-06-05 21:53:10,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:10,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:10,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:10,413 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:10,638 INFO L93 Difference]: Finished difference Result 238 states and 527 transitions. [2021-06-05 21:53:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:10,639 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:53:10,639 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:53:10,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:53:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2021-06-05 21:53:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.255813953488372) internal successors, (485), 215 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 485 transitions. [2021-06-05 21:53:10,641 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 485 transitions. Word has length 19 [2021-06-05 21:53:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:10,641 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 485 transitions. [2021-06-05 21:53:10,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 485 transitions. [2021-06-05 21:53:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:10,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:10,641 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:10,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-06-05 21:53:10,842 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1247977227, now seen corresponding path program 285 times [2021-06-05 21:53:10,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:10,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85098455] [2021-06-05 21:53:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:10,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:10,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85098455] [2021-06-05 21:53:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85098455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235427756] [2021-06-05 21:53:10,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:10,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:10,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:10,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:11,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235427756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:11,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:11,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058459199] [2021-06-05 21:53:11,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:11,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:11,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:11,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:11,158 INFO L87 Difference]: Start difference. First operand 216 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:11,598 INFO L93 Difference]: Finished difference Result 276 states and 591 transitions. [2021-06-05 21:53:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:53:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:11,598 INFO L225 Difference]: With dead ends: 276 [2021-06-05 21:53:11,598 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 21:53:11,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:53:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 21:53:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 217. [2021-06-05 21:53:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-06-05 21:53:11,600 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-06-05 21:53:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:11,601 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-06-05 21:53:11,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-06-05 21:53:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:11,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:11,601 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:11,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:11,801 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1724288673, now seen corresponding path program 286 times [2021-06-05 21:53:11,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:11,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279162500] [2021-06-05 21:53:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:11,913 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 21:53:11,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279162500] [2021-06-05 21:53:11,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279162500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436697602] [2021-06-05 21:53:11,914 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 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 21:53:11,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:11,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:11,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:11,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:12,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436697602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:12,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:12,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596220766] [2021-06-05 21:53:12,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:12,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:12,116 INFO L87 Difference]: Start difference. First operand 217 states and 488 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:12,441 INFO L93 Difference]: Finished difference Result 243 states and 534 transitions. [2021-06-05 21:53:12,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:12,442 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:53:12,442 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 21:53:12,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 21:53:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2021-06-05 21:53:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-06-05 21:53:12,444 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-06-05 21:53:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:12,444 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-06-05 21:53:12,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-06-05 21:53:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:12,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:12,444 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:12,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2257,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:12,645 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1919593976, now seen corresponding path program 287 times [2021-06-05 21:53:12,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:12,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980561064] [2021-06-05 21:53:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:12,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:12,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980561064] [2021-06-05 21:53:12,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980561064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:12,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117003341] [2021-06-05 21:53:12,767 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 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 21:53:12,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:12,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:13,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117003341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:13,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:13,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:13,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857545089] [2021-06-05 21:53:13,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:13,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:13,008 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:13,272 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-06-05 21:53:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:13,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:13,273 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:53:13,273 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:53:13,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:53:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2021-06-05 21:53:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-05 21:53:13,275 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-05 21:53:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:13,275 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-05 21:53:13,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:13,275 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-05 21:53:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:13,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:13,275 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:13,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-06-05 21:53:13,476 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1754323493, now seen corresponding path program 288 times [2021-06-05 21:53:13,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:13,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843778221] [2021-06-05 21:53:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:13,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843778221] [2021-06-05 21:53:13,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843778221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768874175] [2021-06-05 21:53:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:13,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:13,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:13,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:13,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768874175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:13,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:13,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:13,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145834453] [2021-06-05 21:53:13,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:13,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:13,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:13,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:13,856 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:14,159 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-06-05 21:53:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:14,160 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:53:14,160 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:53:14,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:53:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 217. [2021-06-05 21:53:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-06-05 21:53:14,162 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-06-05 21:53:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:14,162 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-06-05 21:53:14,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-06-05 21:53:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:14,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:14,162 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:14,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:14,362 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2041873728, now seen corresponding path program 289 times [2021-06-05 21:53:14,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:14,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866462980] [2021-06-05 21:53:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:14,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:14,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866462980] [2021-06-05 21:53:14,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866462980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:14,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424194950] [2021-06-05 21:53:14,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:14,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424194950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:14,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:14,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:14,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028606586] [2021-06-05 21:53:14,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:14,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:14,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:14,682 INFO L87 Difference]: Start difference. First operand 217 states and 488 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:15,092 INFO L93 Difference]: Finished difference Result 317 states and 668 transitions. [2021-06-05 21:53:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:53:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:15,093 INFO L225 Difference]: With dead ends: 317 [2021-06-05 21:53:15,093 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 21:53:15,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 21:53:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2021-06-05 21:53:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.271889400921659) internal successors, (493), 217 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-06-05 21:53:15,095 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 19 [2021-06-05 21:53:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:15,095 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-06-05 21:53:15,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-06-05 21:53:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:15,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:15,096 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:15,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2281 [2021-06-05 21:53:15,296 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 81838403, now seen corresponding path program 290 times [2021-06-05 21:53:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:15,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097378639] [2021-06-05 21:53:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:15,411 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 21:53:15,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:15,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097378639] [2021-06-05 21:53:15,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097378639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:15,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426152687] [2021-06-05 21:53:15,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:15,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:15,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:15,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:15,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426152687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:15,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:15,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:15,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126664513] [2021-06-05 21:53:15,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:15,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:15,683 INFO L87 Difference]: Start difference. First operand 218 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:15,883 INFO L93 Difference]: Finished difference Result 242 states and 534 transitions. [2021-06-05 21:53:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:15,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:15,884 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:53:15,884 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:53:15,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:53:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-06-05 21:53:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-06-05 21:53:15,886 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-06-05 21:53:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:15,886 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-06-05 21:53:15,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-06-05 21:53:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:15,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:15,886 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:16,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-06-05 21:53:16,087 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1951103288, now seen corresponding path program 291 times [2021-06-05 21:53:16,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:16,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118410199] [2021-06-05 21:53:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:16,206 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 21:53:16,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118410199] [2021-06-05 21:53:16,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118410199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476156621] [2021-06-05 21:53:16,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:16,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:16,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:53:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:16,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476156621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:16,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:16,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:16,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426376582] [2021-06-05 21:53:16,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:16,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:16,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:16,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:16,420 INFO L87 Difference]: Start difference. First operand 218 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:16,724 INFO L93 Difference]: Finished difference Result 265 states and 581 transitions. [2021-06-05 21:53:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:16,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:16,724 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:53:16,724 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 21:53:16,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 21:53:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-06-05 21:53:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-05 21:53:16,726 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-05 21:53:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:16,726 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-05 21:53:16,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-05 21:53:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:16,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:16,727 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:16,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:16,927 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:16,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:16,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1718698653, now seen corresponding path program 292 times [2021-06-05 21:53:16,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:16,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643158655] [2021-06-05 21:53:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:17,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643158655] [2021-06-05 21:53:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643158655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100962487] [2021-06-05 21:53:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:17,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:17,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:17,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:17,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:17,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100962487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:17,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:17,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:17,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738729652] [2021-06-05 21:53:17,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:17,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:17,263 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:17,429 INFO L93 Difference]: Finished difference Result 237 states and 525 transitions. [2021-06-05 21:53:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:17,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:17,430 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:53:17,430 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:53:17,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:53:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2021-06-05 21:53:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-05 21:53:17,432 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-05 21:53:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:17,432 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-05 21:53:17,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-05 21:53:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:17,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:17,432 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:17,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2301,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:17,633 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:17,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:17,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1779532891, now seen corresponding path program 293 times [2021-06-05 21:53:17,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:17,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198327779] [2021-06-05 21:53:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:17,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:17,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198327779] [2021-06-05 21:53:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198327779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:17,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992735594] [2021-06-05 21:53:17,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:17,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:53:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:18,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992735594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:18,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:18,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:18,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267919595] [2021-06-05 21:53:18,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:18,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:18,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:18,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:18,032 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:18,280 INFO L93 Difference]: Finished difference Result 255 states and 558 transitions. [2021-06-05 21:53:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:18,281 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:53:18,281 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:53:18,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:53:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 216. [2021-06-05 21:53:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-06-05 21:53:18,283 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-06-05 21:53:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:18,283 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-06-05 21:53:18,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-06-05 21:53:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:18,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:18,284 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:18,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2306 [2021-06-05 21:53:18,497 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash -652136798, now seen corresponding path program 294 times [2021-06-05 21:53:18,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:18,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261304225] [2021-06-05 21:53:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:18,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:18,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261304225] [2021-06-05 21:53:18,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261304225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:18,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274569905] [2021-06-05 21:53:18,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:18,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:53:18,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:18,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:18,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274569905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:18,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:18,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702192425] [2021-06-05 21:53:18,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:18,881 INFO L87 Difference]: Start difference. First operand 216 states and 486 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:19,540 INFO L93 Difference]: Finished difference Result 359 states and 741 transitions. [2021-06-05 21:53:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:53:19,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:19,541 INFO L225 Difference]: With dead ends: 359 [2021-06-05 21:53:19,541 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 21:53:19,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 733.6ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:53:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 21:53:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 221. [2021-06-05 21:53:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2772727272727273) internal successors, (501), 220 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 501 transitions. [2021-06-05 21:53:19,543 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 501 transitions. Word has length 19 [2021-06-05 21:53:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:19,543 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 501 transitions. [2021-06-05 21:53:19,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 501 transitions. [2021-06-05 21:53:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:19,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:19,544 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:19,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2314,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:19,744 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:19,744 INFO L82 PathProgramCache]: Analyzing trace with hash -145790532, now seen corresponding path program 295 times [2021-06-05 21:53:19,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:19,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229311726] [2021-06-05 21:53:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:19,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:19,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229311726] [2021-06-05 21:53:19,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229311726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:19,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378294409] [2021-06-05 21:53:19,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:20,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378294409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:20,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:20,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:20,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551207943] [2021-06-05 21:53:20,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:20,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:20,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:20,071 INFO L87 Difference]: Start difference. First operand 221 states and 501 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:20,553 INFO L93 Difference]: Finished difference Result 310 states and 655 transitions. [2021-06-05 21:53:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:53:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:20,554 INFO L225 Difference]: With dead ends: 310 [2021-06-05 21:53:20,554 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 21:53:20,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:53:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 21:53:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 220. [2021-06-05 21:53:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.269406392694064) internal successors, (497), 219 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 497 transitions. [2021-06-05 21:53:20,556 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 497 transitions. Word has length 19 [2021-06-05 21:53:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:20,556 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 497 transitions. [2021-06-05 21:53:20,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 497 transitions. [2021-06-05 21:53:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:20,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:20,556 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:20,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-06-05 21:53:20,757 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:20,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash -683646110, now seen corresponding path program 296 times [2021-06-05 21:53:20,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:20,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689994318] [2021-06-05 21:53:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:20,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:20,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689994318] [2021-06-05 21:53:20,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689994318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:20,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943672027] [2021-06-05 21:53:20,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:20,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:20,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:20,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:20,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943672027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:21,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:21,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:21,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592102061] [2021-06-05 21:53:21,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:21,093 INFO L87 Difference]: Start difference. First operand 220 states and 497 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:21,384 INFO L93 Difference]: Finished difference Result 263 states and 578 transitions. [2021-06-05 21:53:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:21,385 INFO L225 Difference]: With dead ends: 263 [2021-06-05 21:53:21,385 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 21:53:21,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 21:53:21,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 218. [2021-06-05 21:53:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-05 21:53:21,387 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-05 21:53:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:21,387 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-05 21:53:21,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-05 21:53:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:21,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:21,387 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:21,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2329 [2021-06-05 21:53:21,588 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1538645733, now seen corresponding path program 297 times [2021-06-05 21:53:21,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:21,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280939082] [2021-06-05 21:53:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:21,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280939082] [2021-06-05 21:53:21,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280939082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840874188] [2021-06-05 21:53:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:53:21,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:21,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:21,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840874188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:21,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:21,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:21,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824444785] [2021-06-05 21:53:21,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:21,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:21,979 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:22,271 INFO L93 Difference]: Finished difference Result 258 states and 561 transitions. [2021-06-05 21:53:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:22,271 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:53:22,271 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 21:53:22,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 21:53:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2021-06-05 21:53:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2636363636363637) internal successors, (498), 220 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 498 transitions. [2021-06-05 21:53:22,273 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 498 transitions. Word has length 19 [2021-06-05 21:53:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:22,273 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 498 transitions. [2021-06-05 21:53:22,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 498 transitions. [2021-06-05 21:53:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:22,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:22,274 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:22,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-06-05 21:53:22,474 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1826195968, now seen corresponding path program 298 times [2021-06-05 21:53:22,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:22,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164255829] [2021-06-05 21:53:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:22,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164255829] [2021-06-05 21:53:22,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164255829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427037954] [2021-06-05 21:53:22,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:22,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:22,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:22,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427037954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:22,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:22,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:22,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973800501] [2021-06-05 21:53:22,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:22,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:22,811 INFO L87 Difference]: Start difference. First operand 221 states and 498 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:23,344 INFO L93 Difference]: Finished difference Result 298 states and 631 transitions. [2021-06-05 21:53:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:23,345 INFO L225 Difference]: With dead ends: 298 [2021-06-05 21:53:23,345 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 21:53:23,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 576.7ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:53:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 21:53:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2021-06-05 21:53:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-06-05 21:53:23,347 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-06-05 21:53:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:23,347 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-06-05 21:53:23,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-06-05 21:53:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:23,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:23,348 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:23,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-06-05 21:53:23,548 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash -133839357, now seen corresponding path program 299 times [2021-06-05 21:53:23,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:23,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191154856] [2021-06-05 21:53:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:23,645 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 21:53:23,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:23,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191154856] [2021-06-05 21:53:23,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191154856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:23,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605481316] [2021-06-05 21:53:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:23,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:23,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:23,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:23,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605481316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:23,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:23,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:23,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092465934] [2021-06-05 21:53:23,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:23,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:23,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:23,945 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:24,205 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-06-05 21:53:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:24,206 INFO L225 Difference]: With dead ends: 249 [2021-06-05 21:53:24,206 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 21:53:24,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 21:53:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2021-06-05 21:53:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.27027027027027) internal successors, (504), 222 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 504 transitions. [2021-06-05 21:53:24,208 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 504 transitions. Word has length 19 [2021-06-05 21:53:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:24,208 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 504 transitions. [2021-06-05 21:53:24,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 504 transitions. [2021-06-05 21:53:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:24,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:24,208 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:24,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-06-05 21:53:24,409 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2128186248, now seen corresponding path program 300 times [2021-06-05 21:53:24,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:24,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643568792] [2021-06-05 21:53:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:24,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643568792] [2021-06-05 21:53:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643568792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227953584] [2021-06-05 21:53:24,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:24,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:24,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:24,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:24,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227953584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:24,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:24,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:24,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487295687] [2021-06-05 21:53:24,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:24,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:24,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:24,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:24,731 INFO L87 Difference]: Start difference. First operand 223 states and 504 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:25,075 INFO L93 Difference]: Finished difference Result 255 states and 564 transitions. [2021-06-05 21:53:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:25,076 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:53:25,076 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:53:25,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:53:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 222. [2021-06-05 21:53:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.271493212669683) internal successors, (502), 221 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 502 transitions. [2021-06-05 21:53:25,078 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 502 transitions. Word has length 19 [2021-06-05 21:53:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:25,078 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 502 transitions. [2021-06-05 21:53:25,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 502 transitions. [2021-06-05 21:53:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:25,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:25,079 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:25,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2357,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:25,285 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1660434782, now seen corresponding path program 301 times [2021-06-05 21:53:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:25,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2797954] [2021-06-05 21:53:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:25,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:25,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2797954] [2021-06-05 21:53:25,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2797954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:25,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671561463] [2021-06-05 21:53:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:25,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:25,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671561463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:25,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:25,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932036346] [2021-06-05 21:53:25,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:25,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:25,594 INFO L87 Difference]: Start difference. First operand 222 states and 502 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:25,719 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-06-05 21:53:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:25,720 INFO L225 Difference]: With dead ends: 249 [2021-06-05 21:53:25,720 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 21:53:25,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 21:53:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 219. [2021-06-05 21:53:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-05 21:53:25,722 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-05 21:53:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:25,722 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-05 21:53:25,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-05 21:53:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:25,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:25,722 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:25,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:25,923 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:25,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1443064199, now seen corresponding path program 302 times [2021-06-05 21:53:25,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:25,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425381172] [2021-06-05 21:53:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:26,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:26,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425381172] [2021-06-05 21:53:26,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425381172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:26,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019506368] [2021-06-05 21:53:26,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:26,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:26,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:53:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:26,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019506368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:26,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:26,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361413374] [2021-06-05 21:53:26,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:26,270 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:26,587 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-06-05 21:53:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:26,588 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:53:26,588 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:53:26,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:53:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 219. [2021-06-05 21:53:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-05 21:53:26,590 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-05 21:53:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:26,590 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-05 21:53:26,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-05 21:53:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:26,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:26,590 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:26,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2367,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:26,791 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024113, now seen corresponding path program 303 times [2021-06-05 21:53:26,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:26,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292845897] [2021-06-05 21:53:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:26,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292845897] [2021-06-05 21:53:26,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292845897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412150250] [2021-06-05 21:53:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:26,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:26,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:26,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:26,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:27,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412150250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:27,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:27,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:27,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252191683] [2021-06-05 21:53:27,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:27,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:27,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:27,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:27,113 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:27,603 INFO L93 Difference]: Finished difference Result 250 states and 554 transitions. [2021-06-05 21:53:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:27,603 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:53:27,603 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 21:53:27,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 559.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:53:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 21:53:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 219. [2021-06-05 21:53:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-05 21:53:27,605 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-05 21:53:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:27,606 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-05 21:53:27,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-05 21:53:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:27,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:27,606 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:27,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:27,806 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1530947719, now seen corresponding path program 304 times [2021-06-05 21:53:27,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:27,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368597260] [2021-06-05 21:53:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:27,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:27,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368597260] [2021-06-05 21:53:27,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368597260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:27,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607211943] [2021-06-05 21:53:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:27,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:27,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:27,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:28,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607211943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:28,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:28,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026422546] [2021-06-05 21:53:28,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:28,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:28,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:28,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:28,138 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:28,686 INFO L93 Difference]: Finished difference Result 255 states and 563 transitions. [2021-06-05 21:53:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:28,687 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:53:28,687 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:53:28,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:53:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:53:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-06-05 21:53:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-05 21:53:28,689 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-05 21:53:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:28,689 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-05 21:53:28,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-05 21:53:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:28,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:28,689 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:28,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-06-05 21:53:28,897 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1967283825, now seen corresponding path program 305 times [2021-06-05 21:53:28,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:28,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651467915] [2021-06-05 21:53:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:28,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651467915] [2021-06-05 21:53:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651467915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146366406] [2021-06-05 21:53:28,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:29,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:29,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:29,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:29,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146366406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:29,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:29,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:29,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155136473] [2021-06-05 21:53:29,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:29,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:29,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:29,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:29,226 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:30,049 INFO L93 Difference]: Finished difference Result 289 states and 617 transitions. [2021-06-05 21:53:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:53:30,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:30,050 INFO L225 Difference]: With dead ends: 289 [2021-06-05 21:53:30,050 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 21:53:30,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 899.0ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:53:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 21:53:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 220. [2021-06-05 21:53:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2648401826484017) internal successors, (496), 219 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 496 transitions. [2021-06-05 21:53:30,052 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 496 transitions. Word has length 19 [2021-06-05 21:53:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:30,052 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 496 transitions. [2021-06-05 21:53:30,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 496 transitions. [2021-06-05 21:53:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:30,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:30,053 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:30,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2381,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:30,269 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -839887732, now seen corresponding path program 306 times [2021-06-05 21:53:30,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:30,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771238545] [2021-06-05 21:53:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:30,363 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 21:53:30,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:30,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771238545] [2021-06-05 21:53:30,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771238545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:30,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119175587] [2021-06-05 21:53:30,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:30,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:30,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:30,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119175587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:30,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:30,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:30,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52467589] [2021-06-05 21:53:30,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:30,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:30,653 INFO L87 Difference]: Start difference. First operand 220 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:30,975 INFO L93 Difference]: Finished difference Result 246 states and 545 transitions. [2021-06-05 21:53:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:30,976 INFO L225 Difference]: With dead ends: 246 [2021-06-05 21:53:30,976 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:53:30,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:53:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 220. [2021-06-05 21:53:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:53:30,978 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:53:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:30,978 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:53:30,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:53:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:30,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:30,978 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:31,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2388 [2021-06-05 21:53:31,179 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -425566935, now seen corresponding path program 307 times [2021-06-05 21:53:31,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:31,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544138867] [2021-06-05 21:53:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:31,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:31,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544138867] [2021-06-05 21:53:31,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544138867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:31,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038091453] [2021-06-05 21:53:31,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:31,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:31,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038091453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:31,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:31,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:31,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181973488] [2021-06-05 21:53:31,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:31,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:31,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:31,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:31,478 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:31,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:31,700 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-06-05 21:53:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:31,701 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:53:31,701 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 21:53:31,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 21:53:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2021-06-05 21:53:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:53:31,703 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:53:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:31,703 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:53:31,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:53:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:31,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:31,703 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:31,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:31,904 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1496562399, now seen corresponding path program 308 times [2021-06-05 21:53:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:31,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404953874] [2021-06-05 21:53:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:32,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:32,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404953874] [2021-06-05 21:53:32,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404953874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:32,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253057815] [2021-06-05 21:53:32,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:32,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:32,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:32,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253057815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:32,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:32,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123972992] [2021-06-05 21:53:32,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:32,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:32,209 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:32,652 INFO L93 Difference]: Finished difference Result 256 states and 566 transitions. [2021-06-05 21:53:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:32,652 INFO L225 Difference]: With dead ends: 256 [2021-06-05 21:53:32,652 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 21:53:32,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:53:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 21:53:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 220. [2021-06-05 21:53:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-05 21:53:32,654 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-05 21:53:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:32,654 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-05 21:53:32,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-05 21:53:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:32,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:32,655 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:32,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2401 [2021-06-05 21:53:32,855 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash 670319846, now seen corresponding path program 309 times [2021-06-05 21:53:32,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:32,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93426592] [2021-06-05 21:53:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:32,951 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 21:53:32,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:32,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93426592] [2021-06-05 21:53:32,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93426592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:32,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947877753] [2021-06-05 21:53:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:32,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:33,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947877753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:33,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:33,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:33,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631261849] [2021-06-05 21:53:33,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:33,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:33,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:33,204 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:33,530 INFO L93 Difference]: Finished difference Result 272 states and 582 transitions. [2021-06-05 21:53:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:33,531 INFO L225 Difference]: With dead ends: 272 [2021-06-05 21:53:33,531 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 21:53:33,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 21:53:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2021-06-05 21:53:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2690582959641254) internal successors, (506), 223 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 506 transitions. [2021-06-05 21:53:33,533 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 506 transitions. Word has length 19 [2021-06-05 21:53:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:33,533 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 506 transitions. [2021-06-05 21:53:33,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 506 transitions. [2021-06-05 21:53:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:33,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:33,533 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:33,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:33,734 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:33,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:33,734 INFO L82 PathProgramCache]: Analyzing trace with hash -699826647, now seen corresponding path program 310 times [2021-06-05 21:53:33,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:33,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482325389] [2021-06-05 21:53:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:33,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:33,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482325389] [2021-06-05 21:53:33,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482325389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:33,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921986711] [2021-06-05 21:53:33,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:33,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:33,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:33,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:33,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921986711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:34,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:34,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:34,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134433224] [2021-06-05 21:53:34,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:34,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:34,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:34,041 INFO L87 Difference]: Start difference. First operand 224 states and 506 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:34,545 INFO L93 Difference]: Finished difference Result 265 states and 584 transitions. [2021-06-05 21:53:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:34,546 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:53:34,546 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:53:34,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:53:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:53:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 224. [2021-06-05 21:53:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2645739910313902) internal successors, (505), 223 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2021-06-05 21:53:34,548 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 19 [2021-06-05 21:53:34,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:34,548 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2021-06-05 21:53:34,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2021-06-05 21:53:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:34,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:34,549 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:34,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2413,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:34,749 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:34,749 INFO L82 PathProgramCache]: Analyzing trace with hash 427569446, now seen corresponding path program 311 times [2021-06-05 21:53:34,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:34,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497020666] [2021-06-05 21:53:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:34,845 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 21:53:34,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:34,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497020666] [2021-06-05 21:53:34,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497020666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:34,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257764286] [2021-06-05 21:53:34,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:34,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:53:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:34,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:53:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:35,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257764286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:35,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:35,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169236285] [2021-06-05 21:53:35,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:35,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:35,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:35,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:35,098 INFO L87 Difference]: Start difference. First operand 224 states and 505 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:35,326 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-06-05 21:53:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:53:35,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:35,327 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:53:35,327 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 21:53:35,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 21:53:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 218. [2021-06-05 21:53:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-05 21:53:35,329 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-05 21:53:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:35,329 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-05 21:53:35,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-05 21:53:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:35,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:35,329 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:35,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-06-05 21:53:35,530 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1315269959, now seen corresponding path program 312 times [2021-06-05 21:53:35,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:35,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734797068] [2021-06-05 21:53:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:35,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:35,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734797068] [2021-06-05 21:53:35,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734797068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:35,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98599557] [2021-06-05 21:53:35,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:35,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:35,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:35,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:35,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98599557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:35,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:35,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:35,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061629991] [2021-06-05 21:53:35,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:35,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:35,856 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:36,045 INFO L93 Difference]: Finished difference Result 243 states and 540 transitions. [2021-06-05 21:53:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:36,046 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:53:36,046 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 21:53:36,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 21:53:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 218. [2021-06-05 21:53:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-05 21:53:36,048 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-05 21:53:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:36,048 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-05 21:53:36,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-05 21:53:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:36,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:36,048 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:36,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:36,248 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2112005711, now seen corresponding path program 313 times [2021-06-05 21:53:36,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:36,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173488846] [2021-06-05 21:53:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:36,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:36,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173488846] [2021-06-05 21:53:36,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173488846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:36,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954538140] [2021-06-05 21:53:36,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:36,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954538140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:36,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:36,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:36,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664508606] [2021-06-05 21:53:36,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:36,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:36,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:36,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:36,567 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:36,887 INFO L93 Difference]: Finished difference Result 249 states and 552 transitions. [2021-06-05 21:53:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:36,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:36,887 INFO L225 Difference]: With dead ends: 249 [2021-06-05 21:53:36,887 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 21:53:36,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 21:53:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 218. [2021-06-05 21:53:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-05 21:53:36,889 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-05 21:53:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:36,890 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-05 21:53:36,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-05 21:53:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:36,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:36,890 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:37,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2433 [2021-06-05 21:53:37,090 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1895411350, now seen corresponding path program 314 times [2021-06-05 21:53:37,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:37,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006462863] [2021-06-05 21:53:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:37,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006462863] [2021-06-05 21:53:37,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006462863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953339871] [2021-06-05 21:53:37,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:37,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:37,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:37,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:37,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953339871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:37,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:37,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:37,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578358089] [2021-06-05 21:53:37,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:37,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:37,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:37,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:37,445 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:37,636 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-06-05 21:53:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:37,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:37,637 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:53:37,637 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:53:37,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:53:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 215. [2021-06-05 21:53:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-05 21:53:37,639 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-05 21:53:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:37,639 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-05 21:53:37,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-05 21:53:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:37,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:37,639 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:37,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:37,840 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:37,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1676615319, now seen corresponding path program 315 times [2021-06-05 21:53:37,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:37,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620989783] [2021-06-05 21:53:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:37,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620989783] [2021-06-05 21:53:37,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620989783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773158873] [2021-06-05 21:53:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:37,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:37,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:38,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:38,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773158873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:38,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:38,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:38,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434383347] [2021-06-05 21:53:38,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:38,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:38,235 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:38,522 INFO L93 Difference]: Finished difference Result 249 states and 541 transitions. [2021-06-05 21:53:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:38,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:38,523 INFO L225 Difference]: With dead ends: 249 [2021-06-05 21:53:38,523 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 21:53:38,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 21:53:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 226. [2021-06-05 21:53:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2355555555555555) internal successors, (503), 225 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 503 transitions. [2021-06-05 21:53:38,525 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 503 transitions. Word has length 19 [2021-06-05 21:53:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:38,525 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 503 transitions. [2021-06-05 21:53:38,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 503 transitions. [2021-06-05 21:53:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:38,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:38,525 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:38,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:38,726 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1389065084, now seen corresponding path program 316 times [2021-06-05 21:53:38,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:38,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485177136] [2021-06-05 21:53:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:38,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:38,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485177136] [2021-06-05 21:53:38,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485177136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:38,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759963562] [2021-06-05 21:53:38,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:38,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:39,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759963562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:39,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:39,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:39,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886900595] [2021-06-05 21:53:39,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:39,041 INFO L87 Difference]: Start difference. First operand 226 states and 503 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:39,358 INFO L93 Difference]: Finished difference Result 311 states and 659 transitions. [2021-06-05 21:53:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:39,358 INFO L225 Difference]: With dead ends: 311 [2021-06-05 21:53:39,358 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 21:53:39,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 21:53:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 227. [2021-06-05 21:53:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.247787610619469) internal successors, (508), 226 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 508 transitions. [2021-06-05 21:53:39,361 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 508 transitions. Word has length 19 [2021-06-05 21:53:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:39,361 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 508 transitions. [2021-06-05 21:53:39,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 508 transitions. [2021-06-05 21:53:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:39,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:39,361 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:39,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2456 [2021-06-05 21:53:39,561 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash 945866887, now seen corresponding path program 317 times [2021-06-05 21:53:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:39,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664801133] [2021-06-05 21:53:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:39,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:39,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664801133] [2021-06-05 21:53:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664801133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:39,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450929581] [2021-06-05 21:53:39,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:39,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:53:39,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:39,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:39,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450929581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:39,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:39,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:39,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436479150] [2021-06-05 21:53:39,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:39,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:39,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:39,949 INFO L87 Difference]: Start difference. First operand 227 states and 508 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:40,157 INFO L93 Difference]: Finished difference Result 236 states and 524 transitions. [2021-06-05 21:53:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:40,157 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:53:40,157 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 21:53:40,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 21:53:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 218. [2021-06-05 21:53:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-06-05 21:53:40,159 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-06-05 21:53:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:40,159 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-06-05 21:53:40,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-06-05 21:53:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:40,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:40,160 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:40,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-06-05 21:53:40,360 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1087074804, now seen corresponding path program 318 times [2021-06-05 21:53:40,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:40,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656694697] [2021-06-05 21:53:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:40,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:40,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656694697] [2021-06-05 21:53:40,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656694697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:40,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080782940] [2021-06-05 21:53:40,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:40,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:53:40,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:40,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080782940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:40,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:40,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:40,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688418984] [2021-06-05 21:53:40,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:40,681 INFO L87 Difference]: Start difference. First operand 218 states and 492 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:40,851 INFO L93 Difference]: Finished difference Result 252 states and 558 transitions. [2021-06-05 21:53:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:40,852 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:53:40,852 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:53:40,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:53:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 213. [2021-06-05 21:53:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-06-05 21:53:40,854 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-06-05 21:53:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:40,854 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-06-05 21:53:40,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-06-05 21:53:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:40,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:40,854 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:41,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2471 [2021-06-05 21:53:41,055 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:41,055 INFO L82 PathProgramCache]: Analyzing trace with hash 210899919, now seen corresponding path program 319 times [2021-06-05 21:53:41,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:41,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786551295] [2021-06-05 21:53:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:41,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786551295] [2021-06-05 21:53:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786551295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557958999] [2021-06-05 21:53:41,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:53:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:41,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557958999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:41,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:41,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:41,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815331873] [2021-06-05 21:53:41,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:41,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:41,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:41,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:41,449 INFO L87 Difference]: Start difference. First operand 213 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:41,651 INFO L93 Difference]: Finished difference Result 236 states and 525 transitions. [2021-06-05 21:53:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:41,652 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:53:41,652 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:53:41,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:53:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2021-06-05 21:53:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-05 21:53:41,654 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-05 21:53:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:41,654 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-05 21:53:41,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-05 21:53:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:41,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:41,654 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:41,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2476 [2021-06-05 21:53:41,855 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:41,855 INFO L82 PathProgramCache]: Analyzing trace with hash -860095545, now seen corresponding path program 320 times [2021-06-05 21:53:41,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:41,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636054850] [2021-06-05 21:53:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:41,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636054850] [2021-06-05 21:53:41,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636054850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622418897] [2021-06-05 21:53:41,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:41,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:41,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:42,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622418897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:42,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:42,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:42,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225369680] [2021-06-05 21:53:42,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:42,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:42,165 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:42,573 INFO L93 Difference]: Finished difference Result 252 states and 557 transitions. [2021-06-05 21:53:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:42,574 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:53:42,574 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:53:42,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:53:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 215. [2021-06-05 21:53:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-05 21:53:42,576 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-05 21:53:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:42,576 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-05 21:53:42,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-05 21:53:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:42,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:42,576 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:42,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2480,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:42,777 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -63359793, now seen corresponding path program 321 times [2021-06-05 21:53:42,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:42,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285041643] [2021-06-05 21:53:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:42,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:42,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285041643] [2021-06-05 21:53:42,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285041643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:42,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881313393] [2021-06-05 21:53:42,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:42,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:42,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:42,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:43,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881313393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:43,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:43,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014789874] [2021-06-05 21:53:43,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:43,086 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:43,583 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-06-05 21:53:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:43,583 INFO L225 Difference]: With dead ends: 263 [2021-06-05 21:53:43,584 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 21:53:43,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:53:43,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 21:53:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 216. [2021-06-05 21:53:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-06-05 21:53:43,586 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-06-05 21:53:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:43,586 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-06-05 21:53:43,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-06-05 21:53:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:43,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:43,586 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:43,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2485 [2021-06-05 21:53:43,786 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1064036300, now seen corresponding path program 322 times [2021-06-05 21:53:43,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:43,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987237250] [2021-06-05 21:53:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:43,884 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 21:53:43,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987237250] [2021-06-05 21:53:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987237250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938226293] [2021-06-05 21:53:43,885 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 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 21:53:43,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:44,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938226293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:44,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:44,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:44,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472031361] [2021-06-05 21:53:44,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:44,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:44,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:44,134 INFO L87 Difference]: Start difference. First operand 216 states and 486 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:44,544 INFO L93 Difference]: Finished difference Result 265 states and 576 transitions. [2021-06-05 21:53:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:53:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:44,545 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:53:44,545 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 21:53:44,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 21:53:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-06-05 21:53:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-05 21:53:44,547 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-05 21:53:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:44,547 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-05 21:53:44,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-05 21:53:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:44,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:44,547 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:44,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:44,748 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:44,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1951736813, now seen corresponding path program 323 times [2021-06-05 21:53:44,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:44,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308428132] [2021-06-05 21:53:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:44,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:44,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308428132] [2021-06-05 21:53:44,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308428132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:44,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251199078] [2021-06-05 21:53:44,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:44,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:53:44,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:45,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251199078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:45,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:45,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:45,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920645679] [2021-06-05 21:53:45,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:45,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:45,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:45,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:45,079 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:45,309 INFO L93 Difference]: Finished difference Result 239 states and 531 transitions. [2021-06-05 21:53:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:53:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:45,309 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:53:45,309 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 21:53:45,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 21:53:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 214. [2021-06-05 21:53:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-05 21:53:45,311 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-05 21:53:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:45,311 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-05 21:53:45,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-05 21:53:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:45,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:45,312 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:45,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-06-05 21:53:45,512 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1546494731, now seen corresponding path program 324 times [2021-06-05 21:53:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:45,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035061094] [2021-06-05 21:53:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:45,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035061094] [2021-06-05 21:53:45,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035061094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581009524] [2021-06-05 21:53:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:45,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:45,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:45,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:53:45,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:45,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581009524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:45,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:45,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:53:45,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435263484] [2021-06-05 21:53:45,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:45,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:45,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:45,847 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:46,144 INFO L93 Difference]: Finished difference Result 251 states and 555 transitions. [2021-06-05 21:53:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:46,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:46,144 INFO L225 Difference]: With dead ends: 251 [2021-06-05 21:53:46,144 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 21:53:46,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 21:53:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 214. [2021-06-05 21:53:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-05 21:53:46,146 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-05 21:53:46,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:46,147 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-05 21:53:46,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,147 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-05 21:53:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:46,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:46,147 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:46,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2505,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:46,347 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1258944496, now seen corresponding path program 325 times [2021-06-05 21:53:46,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:46,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844320826] [2021-06-05 21:53:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:46,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:46,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844320826] [2021-06-05 21:53:46,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844320826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:46,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868042419] [2021-06-05 21:53:46,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:53:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:46,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:46,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868042419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:46,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:46,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:46,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929320783] [2021-06-05 21:53:46,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:46,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:46,711 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:46,975 INFO L93 Difference]: Finished difference Result 234 states and 520 transitions. [2021-06-05 21:53:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:46,976 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:53:46,976 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:53:46,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:53:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 211. [2021-06-05 21:53:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-05 21:53:46,978 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-05 21:53:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:46,978 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-05 21:53:46,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-05 21:53:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:46,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:46,978 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:47,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2513 [2021-06-05 21:53:47,179 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:47,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1040148465, now seen corresponding path program 326 times [2021-06-05 21:53:47,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:47,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453625319] [2021-06-05 21:53:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:47,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453625319] [2021-06-05 21:53:47,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453625319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618547743] [2021-06-05 21:53:47,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:47,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:47,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:47,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618547743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:47,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:47,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:47,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144486823] [2021-06-05 21:53:47,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:47,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:47,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:47,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:47,568 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:47,827 INFO L93 Difference]: Finished difference Result 245 states and 534 transitions. [2021-06-05 21:53:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:47,827 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:53:47,827 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:53:47,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:53:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-06-05 21:53:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-06-05 21:53:47,829 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-06-05 21:53:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:47,829 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-06-05 21:53:47,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-06-05 21:53:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:47,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:47,830 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:48,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2521 [2021-06-05 21:53:48,030 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:48,030 INFO L82 PathProgramCache]: Analyzing trace with hash -752598230, now seen corresponding path program 327 times [2021-06-05 21:53:48,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:48,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653268880] [2021-06-05 21:53:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:48,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:48,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653268880] [2021-06-05 21:53:48,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653268880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:48,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125146548] [2021-06-05 21:53:48,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:48,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:53:48,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:48,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125146548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:48,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:48,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:48,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786349316] [2021-06-05 21:53:48,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:48,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:48,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:48,357 INFO L87 Difference]: Start difference. First operand 213 states and 478 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:48,653 INFO L93 Difference]: Finished difference Result 304 states and 644 transitions. [2021-06-05 21:53:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:48,654 INFO L225 Difference]: With dead ends: 304 [2021-06-05 21:53:48,654 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 21:53:48,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 21:53:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 214. [2021-06-05 21:53:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-06-05 21:53:48,656 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-06-05 21:53:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:48,656 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-06-05 21:53:48,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-06-05 21:53:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:48,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:48,657 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:48,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:48,857 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1582333741, now seen corresponding path program 328 times [2021-06-05 21:53:48,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:48,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116705391] [2021-06-05 21:53:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:48,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:48,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116705391] [2021-06-05 21:53:48,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116705391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:48,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359250527] [2021-06-05 21:53:48,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:49,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:49,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359250527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:49,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:49,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:49,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896408717] [2021-06-05 21:53:49,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:49,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:49,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:49,249 INFO L87 Difference]: Start difference. First operand 214 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:49,430 INFO L93 Difference]: Finished difference Result 232 states and 514 transitions. [2021-06-05 21:53:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:49,431 INFO L225 Difference]: With dead ends: 232 [2021-06-05 21:53:49,431 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:53:49,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:53:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2021-06-05 21:53:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2629107981220655) internal successors, (482), 213 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 482 transitions. [2021-06-05 21:53:49,433 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 482 transitions. Word has length 19 [2021-06-05 21:53:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:49,433 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 482 transitions. [2021-06-05 21:53:49,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 482 transitions. [2021-06-05 21:53:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:49,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:49,433 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:49,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-06-05 21:53:49,633 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash -450607950, now seen corresponding path program 329 times [2021-06-05 21:53:49,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:49,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732209634] [2021-06-05 21:53:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:49,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:49,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732209634] [2021-06-05 21:53:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732209634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:49,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138686970] [2021-06-05 21:53:49,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:49,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138686970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:49,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:49,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073118481] [2021-06-05 21:53:49,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:49,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:49,986 INFO L87 Difference]: Start difference. First operand 214 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:50,191 INFO L93 Difference]: Finished difference Result 248 states and 548 transitions. [2021-06-05 21:53:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:50,191 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:53:50,191 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 21:53:50,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:50,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 21:53:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 210. [2021-06-05 21:53:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-05 21:53:50,193 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-05 21:53:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:50,194 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-05 21:53:50,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-05 21:53:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:50,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:50,194 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:50,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-06-05 21:53:50,410 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1075773305, now seen corresponding path program 330 times [2021-06-05 21:53:50,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:50,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144915869] [2021-06-05 21:53:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:50,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:50,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144915869] [2021-06-05 21:53:50,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144915869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:50,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270743425] [2021-06-05 21:53:50,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:50,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:50,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:50,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270743425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:50,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:50,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:50,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016250267] [2021-06-05 21:53:50,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:50,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:50,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:50,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:50,753 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:50,931 INFO L93 Difference]: Finished difference Result 242 states and 535 transitions. [2021-06-05 21:53:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:50,931 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:53:50,931 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 21:53:50,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 21:53:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-06-05 21:53:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-05 21:53:50,933 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-05 21:53:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:50,933 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-05 21:53:50,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-05 21:53:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:50,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:50,934 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:51,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-06-05 21:53:51,134 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:51,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:51,134 INFO L82 PathProgramCache]: Analyzing trace with hash -279037553, now seen corresponding path program 331 times [2021-06-05 21:53:51,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:51,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191188498] [2021-06-05 21:53:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:51,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:51,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191188498] [2021-06-05 21:53:51,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191188498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:51,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506604349] [2021-06-05 21:53:51,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:51,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506604349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:51,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:51,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857520617] [2021-06-05 21:53:51,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:51,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:51,461 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:51,732 INFO L93 Difference]: Finished difference Result 258 states and 564 transitions. [2021-06-05 21:53:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:51,732 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:53:51,733 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:53:51,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:53:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-06-05 21:53:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-06-05 21:53:51,735 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-06-05 21:53:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:51,735 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-06-05 21:53:51,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-06-05 21:53:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:51,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:51,735 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:51,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2554 [2021-06-05 21:53:51,935 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash 848358540, now seen corresponding path program 332 times [2021-06-05 21:53:51,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:51,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968716153] [2021-06-05 21:53:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:52,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:52,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968716153] [2021-06-05 21:53:52,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968716153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:52,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042005083] [2021-06-05 21:53:52,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:52,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:52,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:52,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042005083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:52,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:52,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:52,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153097355] [2021-06-05 21:53:52,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:52,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:52,293 INFO L87 Difference]: Start difference. First operand 212 states and 476 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:52,951 INFO L93 Difference]: Finished difference Result 349 states and 723 transitions. [2021-06-05 21:53:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:53:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:52,952 INFO L225 Difference]: With dead ends: 349 [2021-06-05 21:53:52,952 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 21:53:52,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:53:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 21:53:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 216. [2021-06-05 21:53:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2837209302325583) internal successors, (491), 215 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 491 transitions. [2021-06-05 21:53:52,954 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 491 transitions. Word has length 19 [2021-06-05 21:53:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:52,954 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 491 transitions. [2021-06-05 21:53:52,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 491 transitions. [2021-06-05 21:53:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:52,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:52,955 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:53,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:53,155 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:53,155 INFO L82 PathProgramCache]: Analyzing trace with hash 227308713, now seen corresponding path program 333 times [2021-06-05 21:53:53,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:53,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351570918] [2021-06-05 21:53:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:53,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:53,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351570918] [2021-06-05 21:53:53,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351570918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:53,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410497215] [2021-06-05 21:53:53,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:53,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:53,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410497215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:53,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:53,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:53,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775540942] [2021-06-05 21:53:53,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:53,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:53,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:53,552 INFO L87 Difference]: Start difference. First operand 216 states and 491 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:53,933 INFO L93 Difference]: Finished difference Result 239 states and 532 transitions. [2021-06-05 21:53:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:53,934 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:53:53,934 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 21:53:53,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 531.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 21:53:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-06-05 21:53:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2790697674418605) internal successors, (490), 215 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 490 transitions. [2021-06-05 21:53:53,936 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 490 transitions. Word has length 19 [2021-06-05 21:53:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:53,936 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 490 transitions. [2021-06-05 21:53:53,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 490 transitions. [2021-06-05 21:53:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:53,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:53,936 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:54,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2569,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:54,137 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 514858948, now seen corresponding path program 334 times [2021-06-05 21:53:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529386937] [2021-06-05 21:53:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:54,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:54,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529386937] [2021-06-05 21:53:54,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529386937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:54,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337113482] [2021-06-05 21:53:54,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:54,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:54,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337113482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:54,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:54,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:54,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389088780] [2021-06-05 21:53:54,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:54,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:54,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:54,462 INFO L87 Difference]: Start difference. First operand 216 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:54,876 INFO L93 Difference]: Finished difference Result 293 states and 629 transitions. [2021-06-05 21:53:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:54,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:54,877 INFO L225 Difference]: With dead ends: 293 [2021-06-05 21:53:54,877 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 21:53:54,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 21:53:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 213. [2021-06-05 21:53:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-06-05 21:53:54,879 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-06-05 21:53:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:54,879 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-06-05 21:53:54,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-06-05 21:53:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:54,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:54,879 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:55,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2577 [2021-06-05 21:53:55,079 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:55,080 INFO L82 PathProgramCache]: Analyzing trace with hash 816849228, now seen corresponding path program 335 times [2021-06-05 21:53:55,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:55,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576498562] [2021-06-05 21:53:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:55,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:55,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576498562] [2021-06-05 21:53:55,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576498562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:55,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077980540] [2021-06-05 21:53:55,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:55,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:55,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:55,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:55,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:55,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077980540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:55,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:55,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:55,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800381837] [2021-06-05 21:53:55,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:55,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:55,415 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:55,661 INFO L93 Difference]: Finished difference Result 250 states and 552 transitions. [2021-06-05 21:53:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:55,662 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:53:55,662 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 21:53:55,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 21:53:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2021-06-05 21:53:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-05 21:53:55,664 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-05 21:53:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:55,664 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-05 21:53:55,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-05 21:53:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:55,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:55,664 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:55,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2584,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:55,865 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1255826225, now seen corresponding path program 336 times [2021-06-05 21:53:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938873355] [2021-06-05 21:53:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:55,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:55,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938873355] [2021-06-05 21:53:55,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938873355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:55,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686491266] [2021-06-05 21:53:55,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:55,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:55,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:56,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686491266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:56,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:56,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:56,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146255538] [2021-06-05 21:53:56,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:56,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:56,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:56,258 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:56,668 INFO L93 Difference]: Finished difference Result 251 states and 546 transitions. [2021-06-05 21:53:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:56,669 INFO L225 Difference]: With dead ends: 251 [2021-06-05 21:53:56,669 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 21:53:56,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 517.6ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 21:53:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-06-05 21:53:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-06-05 21:53:56,671 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-06-05 21:53:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:56,671 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-06-05 21:53:56,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-06-05 21:53:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:56,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:56,671 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:56,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-06-05 21:53:56,872 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:56,872 INFO L82 PathProgramCache]: Analyzing trace with hash -968275990, now seen corresponding path program 337 times [2021-06-05 21:53:56,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:56,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52041332] [2021-06-05 21:53:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:56,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:56,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52041332] [2021-06-05 21:53:56,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52041332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:56,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412091058] [2021-06-05 21:53:56,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:57,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412091058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:57,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:57,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:57,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133733436] [2021-06-05 21:53:57,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:57,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:57,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:57,184 INFO L87 Difference]: Start difference. First operand 213 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:57,775 INFO L93 Difference]: Finished difference Result 303 states and 647 transitions. [2021-06-05 21:53:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:53:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:57,776 INFO L225 Difference]: With dead ends: 303 [2021-06-05 21:53:57,776 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 21:53:57,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 609.8ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:53:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 21:53:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 215. [2021-06-05 21:53:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2757009345794392) internal successors, (487), 214 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 487 transitions. [2021-06-05 21:53:57,778 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 487 transitions. Word has length 19 [2021-06-05 21:53:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:57,778 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 487 transitions. [2021-06-05 21:53:57,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:57,778 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 487 transitions. [2021-06-05 21:53:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:57,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:57,779 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:57,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2597 [2021-06-05 21:53:57,979 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:57,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:57,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1366655981, now seen corresponding path program 338 times [2021-06-05 21:53:57,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:57,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330344686] [2021-06-05 21:53:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:58,078 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 21:53:58,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:58,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330344686] [2021-06-05 21:53:58,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330344686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:58,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836407311] [2021-06-05 21:53:58,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:58,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:58,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:58,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836407311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:58,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:58,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494782141] [2021-06-05 21:53:58,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:58,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:58,367 INFO L87 Difference]: Start difference. First operand 215 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:58,716 INFO L93 Difference]: Finished difference Result 239 states and 529 transitions. [2021-06-05 21:53:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:58,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:58,717 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:53:58,717 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 21:53:58,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 21:53:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2021-06-05 21:53:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-06-05 21:53:58,719 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 19 [2021-06-05 21:53:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:58,719 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-06-05 21:53:58,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-06-05 21:53:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:58,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:58,719 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:58,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:58,920 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash -666285710, now seen corresponding path program 339 times [2021-06-05 21:53:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:58,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918029058] [2021-06-05 21:53:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:59,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:59,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918029058] [2021-06-05 21:53:59,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918029058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:59,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125819830] [2021-06-05 21:53:59,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:59,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:53:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:59,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125819830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:59,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:59,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:53:59,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910594615] [2021-06-05 21:53:59,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:59,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:59,245 INFO L87 Difference]: Start difference. First operand 215 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:59,686 INFO L93 Difference]: Finished difference Result 258 states and 569 transitions. [2021-06-05 21:53:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:53:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:59,687 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:53:59,687 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 21:53:59,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:53:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 21:53:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 214. [2021-06-05 21:53:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-06-05 21:53:59,689 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-06-05 21:53:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:59,689 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-06-05 21:53:59,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-06-05 21:53:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:53:59,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:59,689 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:59,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2612 [2021-06-05 21:53:59,890 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash -159939444, now seen corresponding path program 340 times [2021-06-05 21:53:59,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:59,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501946082] [2021-06-05 21:53:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:59,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501946082] [2021-06-05 21:53:59,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501946082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31067623] [2021-06-05 21:53:59,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:00,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:00,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:00,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31067623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:00,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:00,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:00,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748277816] [2021-06-05 21:54:00,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:00,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:00,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:00,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:00,205 INFO L87 Difference]: Start difference. First operand 214 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:00,461 INFO L93 Difference]: Finished difference Result 246 states and 543 transitions. [2021-06-05 21:54:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:00,461 INFO L225 Difference]: With dead ends: 246 [2021-06-05 21:54:00,461 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 21:54:00,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 21:54:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2021-06-05 21:54:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-05 21:54:00,463 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-05 21:54:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:00,463 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-05 21:54:00,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-05 21:54:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:00,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:00,464 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:00,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2617,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:00,664 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:00,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1533464087, now seen corresponding path program 341 times [2021-06-05 21:54:00,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:00,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532337894] [2021-06-05 21:54:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:00,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:00,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532337894] [2021-06-05 21:54:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532337894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:00,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213801481] [2021-06-05 21:54:00,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:00,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:00,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:00,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213801481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:00,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:00,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:00,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81724952] [2021-06-05 21:54:00,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:00,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:00,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:00,979 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:01,142 INFO L93 Difference]: Finished difference Result 232 states and 515 transitions. [2021-06-05 21:54:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:01,142 INFO L225 Difference]: With dead ends: 232 [2021-06-05 21:54:01,142 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 21:54:01,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 21:54:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 210. [2021-06-05 21:54:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-05 21:54:01,144 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-05 21:54:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:01,144 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-05 21:54:01,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-05 21:54:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:01,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:01,145 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:01,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2622,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:01,360 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1690507745, now seen corresponding path program 342 times [2021-06-05 21:54:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:01,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967120534] [2021-06-05 21:54:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:01,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967120534] [2021-06-05 21:54:01,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967120534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856731906] [2021-06-05 21:54:01,464 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:01,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856731906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:01,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:01,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3531419] [2021-06-05 21:54:01,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:01,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:01,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:01,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:01,685 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:02,107 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-06-05 21:54:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:02,108 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:54:02,108 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:54:02,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 459.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:54:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-06-05 21:54:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-05 21:54:02,110 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-05 21:54:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:02,110 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-05 21:54:02,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-05 21:54:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:02,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:02,110 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:02,311 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1807723799, now seen corresponding path program 343 times [2021-06-05 21:54:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:02,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632439780] [2021-06-05 21:54:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:02,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:02,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632439780] [2021-06-05 21:54:02,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632439780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:02,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921506765] [2021-06-05 21:54:02,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:02,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:02,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921506765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:02,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:02,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006280311] [2021-06-05 21:54:02,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:02,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:02,626 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:03,109 INFO L93 Difference]: Finished difference Result 262 states and 570 transitions. [2021-06-05 21:54:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:03,110 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:54:03,110 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 21:54:03,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 21:54:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 210. [2021-06-05 21:54:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-05 21:54:03,112 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-05 21:54:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:03,112 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-05 21:54:03,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-05 21:54:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:03,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:03,112 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:03,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2632,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:03,313 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash -680327706, now seen corresponding path program 344 times [2021-06-05 21:54:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:03,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953895760] [2021-06-05 21:54:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:03,412 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 21:54:03,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:03,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953895760] [2021-06-05 21:54:03,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953895760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:03,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221545709] [2021-06-05 21:54:03,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:03,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:03,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:03,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221545709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:03,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:03,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948618074] [2021-06-05 21:54:03,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:03,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:03,674 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:03,930 INFO L93 Difference]: Finished difference Result 238 states and 522 transitions. [2021-06-05 21:54:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:03,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:03,930 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:54:03,930 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:54:03,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:54:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2021-06-05 21:54:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 21:54:03,932 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-05 21:54:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:03,932 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 21:54:03,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 21:54:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:03,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:03,933 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:04,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2639 [2021-06-05 21:54:04,133 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash 207372807, now seen corresponding path program 345 times [2021-06-05 21:54:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:04,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970707335] [2021-06-05 21:54:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:04,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:04,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970707335] [2021-06-05 21:54:04,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970707335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:04,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744750251] [2021-06-05 21:54:04,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:04,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:04,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744750251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:04,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:04,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:04,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590274474] [2021-06-05 21:54:04,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:04,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:04,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:04,464 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:04,683 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-06-05 21:54:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:04,684 INFO L225 Difference]: With dead ends: 235 [2021-06-05 21:54:04,684 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 21:54:04,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 21:54:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-06-05 21:54:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-05 21:54:04,686 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-05 21:54:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:04,686 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-05 21:54:04,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-05 21:54:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:04,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:04,686 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:04,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2647,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:04,887 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1004108559, now seen corresponding path program 346 times [2021-06-05 21:54:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:04,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704261609] [2021-06-05 21:54:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:05,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704261609] [2021-06-05 21:54:05,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704261609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233129359] [2021-06-05 21:54:05,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:05,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:05,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:05,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233129359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:05,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:05,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:05,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874977460] [2021-06-05 21:54:05,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:05,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:05,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:05,217 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:05,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:05,563 INFO L93 Difference]: Finished difference Result 258 states and 560 transitions. [2021-06-05 21:54:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:05,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:05,563 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:54:05,563 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:54:05,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:54:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 209. [2021-06-05 21:54:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-06-05 21:54:05,565 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-06-05 21:54:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:05,565 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-06-05 21:54:05,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-06-05 21:54:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:05,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:05,566 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:05,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2652 [2021-06-05 21:54:05,766 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2131504652, now seen corresponding path program 347 times [2021-06-05 21:54:05,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:05,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265433129] [2021-06-05 21:54:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:05,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:05,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265433129] [2021-06-05 21:54:05,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265433129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:05,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053033234] [2021-06-05 21:54:05,892 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:05,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:05,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:06,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053033234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:06,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:06,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:06,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904460544] [2021-06-05 21:54:06,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:06,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:06,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:06,135 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:06,898 INFO L93 Difference]: Finished difference Result 343 states and 704 transitions. [2021-06-05 21:54:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:54:06,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:06,899 INFO L225 Difference]: With dead ends: 343 [2021-06-05 21:54:06,899 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 21:54:06,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 832.1ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:54:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 21:54:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 213. [2021-06-05 21:54:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-06-05 21:54:06,901 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-06-05 21:54:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:06,902 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-06-05 21:54:06,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-06-05 21:54:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:06,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:06,902 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:07,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:07,102 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:07,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1510454825, now seen corresponding path program 348 times [2021-06-05 21:54:07,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:07,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070210504] [2021-06-05 21:54:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:07,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:07,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070210504] [2021-06-05 21:54:07,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070210504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:07,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168283694] [2021-06-05 21:54:07,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:07,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:54:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:07,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168283694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:07,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:07,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943734119] [2021-06-05 21:54:07,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:07,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:07,494 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:07,732 INFO L93 Difference]: Finished difference Result 234 states and 522 transitions. [2021-06-05 21:54:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:07,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:07,733 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:54:07,733 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:54:07,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:54:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-06-05 21:54:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-06-05 21:54:07,735 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-06-05 21:54:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:07,735 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-06-05 21:54:07,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-06-05 21:54:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:07,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:07,735 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:07,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2667,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:07,935 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1798005060, now seen corresponding path program 349 times [2021-06-05 21:54:07,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:07,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858258546] [2021-06-05 21:54:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:08,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858258546] [2021-06-05 21:54:08,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858258546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567143366] [2021-06-05 21:54:08,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567143366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:08,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:08,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910753401] [2021-06-05 21:54:08,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:08,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:08,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:08,331 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:08,707 INFO L93 Difference]: Finished difference Result 277 states and 597 transitions. [2021-06-05 21:54:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:08,708 INFO L225 Difference]: With dead ends: 277 [2021-06-05 21:54:08,708 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 21:54:08,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 21:54:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-06-05 21:54:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-05 21:54:08,710 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-05 21:54:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:08,710 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-05 21:54:08,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-05 21:54:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:08,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:08,710 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:08,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-06-05 21:54:08,911 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2099995340, now seen corresponding path program 350 times [2021-06-05 21:54:08,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:08,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76773614] [2021-06-05 21:54:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:09,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76773614] [2021-06-05 21:54:09,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76773614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635162943] [2021-06-05 21:54:09,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:09,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:09,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:09,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:09,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635162943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:09,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:09,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618362646] [2021-06-05 21:54:09,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:09,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:09,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:09,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:09,238 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:09,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:09,456 INFO L93 Difference]: Finished difference Result 248 states and 543 transitions. [2021-06-05 21:54:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:09,456 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:54:09,456 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 21:54:09,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 21:54:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 205. [2021-06-05 21:54:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2401960784313726) internal successors, (457), 204 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 457 transitions. [2021-06-05 21:54:09,458 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 457 transitions. Word has length 19 [2021-06-05 21:54:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:09,458 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 457 transitions. [2021-06-05 21:54:09,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 457 transitions. [2021-06-05 21:54:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:09,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:09,459 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:09,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:09,668 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:09,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1474829985, now seen corresponding path program 351 times [2021-06-05 21:54:09,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:09,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085573286] [2021-06-05 21:54:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:09,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:09,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085573286] [2021-06-05 21:54:09,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085573286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:09,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109741251] [2021-06-05 21:54:09,791 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:09,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:09,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:09,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:54:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:10,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109741251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:10,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:10,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:10,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179884514] [2021-06-05 21:54:10,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:10,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:10,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:10,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:10,005 INFO L87 Difference]: Start difference. First operand 205 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:10,166 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-06-05 21:54:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:10,167 INFO L225 Difference]: With dead ends: 235 [2021-06-05 21:54:10,167 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 21:54:10,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 21:54:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-06-05 21:54:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-05 21:54:10,169 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-05 21:54:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:10,169 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-05 21:54:10,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-05 21:54:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:10,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:10,169 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:10,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2686,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:10,370 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:10,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2023401559, now seen corresponding path program 352 times [2021-06-05 21:54:10,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:10,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398626848] [2021-06-05 21:54:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:10,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398626848] [2021-06-05 21:54:10,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398626848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220743909] [2021-06-05 21:54:10,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:10,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:10,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:10,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:10,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:10,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220743909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:10,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:10,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662670807] [2021-06-05 21:54:10,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:10,691 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:10,813 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-06-05 21:54:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:10,814 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:54:10,814 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:54:10,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:54:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2021-06-05 21:54:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-06-05 21:54:10,816 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-06-05 21:54:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:10,816 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-06-05 21:54:10,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-06-05 21:54:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:10,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:10,816 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:11,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2691,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:11,017 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash -896005466, now seen corresponding path program 353 times [2021-06-05 21:54:11,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:11,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395060301] [2021-06-05 21:54:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:11,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:11,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395060301] [2021-06-05 21:54:11,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395060301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:11,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967568989] [2021-06-05 21:54:11,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:11,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:54:11,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:11,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:11,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967568989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:11,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:11,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:11,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440946432] [2021-06-05 21:54:11,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:11,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:11,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:11,372 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:11,534 INFO L93 Difference]: Finished difference Result 231 states and 507 transitions. [2021-06-05 21:54:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:11,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:11,535 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:54:11,535 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 21:54:11,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 21:54:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 207. [2021-06-05 21:54:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-06-05 21:54:11,537 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-06-05 21:54:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:11,537 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-06-05 21:54:11,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-06-05 21:54:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:11,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:11,537 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:11,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2698,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:11,737 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1517055293, now seen corresponding path program 354 times [2021-06-05 21:54:11,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:11,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353456670] [2021-06-05 21:54:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:11,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:11,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353456670] [2021-06-05 21:54:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353456670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384935929] [2021-06-05 21:54:11,857 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:11,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:11,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:11,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:11,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:12,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384935929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:12,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:12,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:12,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150743388] [2021-06-05 21:54:12,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:12,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:12,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:12,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:12,122 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:12,398 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2021-06-05 21:54:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:12,398 INFO L225 Difference]: With dead ends: 225 [2021-06-05 21:54:12,398 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 21:54:12,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 21:54:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2021-06-05 21:54:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-06-05 21:54:12,400 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-06-05 21:54:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:12,400 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-06-05 21:54:12,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-06-05 21:54:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:12,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:12,401 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:12,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2706,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:12,601 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1229505058, now seen corresponding path program 355 times [2021-06-05 21:54:12,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:12,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363465534] [2021-06-05 21:54:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:12,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363465534] [2021-06-05 21:54:12,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363465534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611587471] [2021-06-05 21:54:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:12,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611587471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52722743] [2021-06-05 21:54:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:12,922 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:13,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:13,282 INFO L93 Difference]: Finished difference Result 267 states and 577 transitions. [2021-06-05 21:54:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:13,282 INFO L225 Difference]: With dead ends: 267 [2021-06-05 21:54:13,282 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 21:54:13,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 21:54:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 210. [2021-06-05 21:54:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-05 21:54:13,284 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-05 21:54:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:13,285 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-05 21:54:13,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-05 21:54:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:13,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:13,285 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:13,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:13,485 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash -927514778, now seen corresponding path program 356 times [2021-06-05 21:54:13,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:13,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283632618] [2021-06-05 21:54:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:13,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:13,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283632618] [2021-06-05 21:54:13,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283632618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:13,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429987031] [2021-06-05 21:54:13,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:13,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:13,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429987031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:13,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:13,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666283242] [2021-06-05 21:54:13,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:13,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:13,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:13,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:13,804 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:14,041 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-06-05 21:54:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:14,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:14,042 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:54:14,042 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:54:14,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:54:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-06-05 21:54:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 21:54:14,044 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-05 21:54:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:14,044 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 21:54:14,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 21:54:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:14,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:14,044 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:14,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2721 [2021-06-05 21:54:14,245 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1294777065, now seen corresponding path program 357 times [2021-06-05 21:54:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:14,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335429367] [2021-06-05 21:54:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:14,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:14,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335429367] [2021-06-05 21:54:14,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335429367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:14,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389686940] [2021-06-05 21:54:14,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:14,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:14,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389686940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:14,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:14,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098132525] [2021-06-05 21:54:14,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:14,627 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:14,950 INFO L93 Difference]: Finished difference Result 237 states and 521 transitions. [2021-06-05 21:54:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:14,951 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:54:14,951 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:54:14,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:54:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:54:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 209. [2021-06-05 21:54:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-06-05 21:54:14,953 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-06-05 21:54:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:14,953 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-06-05 21:54:14,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-06-05 21:54:14,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:14,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:14,953 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:15,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2726,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:15,154 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1582327300, now seen corresponding path program 358 times [2021-06-05 21:54:15,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:15,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048703796] [2021-06-05 21:54:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:15,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:15,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048703796] [2021-06-05 21:54:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048703796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:15,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468087436] [2021-06-05 21:54:15,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:15,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:15,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:15,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:15,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468087436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:15,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:15,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160046945] [2021-06-05 21:54:15,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:15,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:15,486 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:15,996 INFO L93 Difference]: Finished difference Result 278 states and 599 transitions. [2021-06-05 21:54:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:15,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:15,996 INFO L225 Difference]: With dead ends: 278 [2021-06-05 21:54:15,996 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 21:54:15,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 588.6ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 21:54:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 211. [2021-06-05 21:54:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-05 21:54:15,999 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-05 21:54:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:15,999 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-05 21:54:15,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-05 21:54:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:15,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:15,999 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:16,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2734 [2021-06-05 21:54:16,199 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1884317580, now seen corresponding path program 359 times [2021-06-05 21:54:16,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:16,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996999986] [2021-06-05 21:54:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:16,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:16,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996999986] [2021-06-05 21:54:16,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996999986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:16,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169419000] [2021-06-05 21:54:16,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:16,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:16,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:16,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169419000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:16,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:16,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:16,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136872755] [2021-06-05 21:54:16,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:16,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:16,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:16,519 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:16,933 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-06-05 21:54:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:16,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:16,934 INFO L225 Difference]: With dead ends: 254 [2021-06-05 21:54:16,934 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 21:54:16,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:54:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 21:54:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 210. [2021-06-05 21:54:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-05 21:54:16,936 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-05 21:54:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:16,936 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-05 21:54:16,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-05 21:54:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:16,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:16,936 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:17,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:17,136 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:17,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1904303450, now seen corresponding path program 360 times [2021-06-05 21:54:17,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:17,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937257759] [2021-06-05 21:54:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:17,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937257759] [2021-06-05 21:54:17,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937257759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069578115] [2021-06-05 21:54:17,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:17,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:17,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:17,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:17,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069578115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:17,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:17,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:17,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879147465] [2021-06-05 21:54:17,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:17,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:17,436 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:17,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:17,626 INFO L93 Difference]: Finished difference Result 242 states and 531 transitions. [2021-06-05 21:54:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:17,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:17,627 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:54:17,627 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 21:54:17,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 21:54:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-06-05 21:54:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 21:54:17,629 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-05 21:54:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:17,629 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 21:54:17,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 21:54:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:17,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:17,629 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:17,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-06-05 21:54:17,830 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2111296839, now seen corresponding path program 361 times [2021-06-05 21:54:17,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:17,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595711348] [2021-06-05 21:54:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:17,958 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 21:54:17,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595711348] [2021-06-05 21:54:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595711348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319985367] [2021-06-05 21:54:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:17,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:18,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319985367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:18,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:18,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:18,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308213724] [2021-06-05 21:54:18,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:18,156 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:18,285 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-06-05 21:54:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:18,285 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:54:18,285 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:54:18,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:54:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-06-05 21:54:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-06-05 21:54:18,287 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-06-05 21:54:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:18,287 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-06-05 21:54:18,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-06-05 21:54:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:18,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:18,287 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:18,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2750 [2021-06-05 21:54:18,488 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934705, now seen corresponding path program 362 times [2021-06-05 21:54:18,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:18,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553080704] [2021-06-05 21:54:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:18,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:18,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553080704] [2021-06-05 21:54:18,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553080704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:18,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192245555] [2021-06-05 21:54:18,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:18,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:18,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192245555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:18,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:18,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:18,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925136142] [2021-06-05 21:54:18,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:18,812 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:19,014 INFO L93 Difference]: Finished difference Result 256 states and 556 transitions. [2021-06-05 21:54:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:19,015 INFO L225 Difference]: With dead ends: 256 [2021-06-05 21:54:19,015 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 21:54:19,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 21:54:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-06-05 21:54:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2392344497607657) internal successors, (468), 209 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 468 transitions. [2021-06-05 21:54:19,017 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 468 transitions. Word has length 19 [2021-06-05 21:54:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:19,017 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 468 transitions. [2021-06-05 21:54:19,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 468 transitions. [2021-06-05 21:54:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:19,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:19,017 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:19,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:19,218 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:19,218 INFO L82 PathProgramCache]: Analyzing trace with hash -259538612, now seen corresponding path program 363 times [2021-06-05 21:54:19,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:19,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507533492] [2021-06-05 21:54:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:19,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:19,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507533492] [2021-06-05 21:54:19,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507533492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:19,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818543662] [2021-06-05 21:54:19,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:19,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:19,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818543662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:19,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:19,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808800902] [2021-06-05 21:54:19,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:19,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:19,575 INFO L87 Difference]: Start difference. First operand 210 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:19,707 INFO L93 Difference]: Finished difference Result 232 states and 509 transitions. [2021-06-05 21:54:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:19,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:19,708 INFO L225 Difference]: With dead ends: 232 [2021-06-05 21:54:19,708 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 21:54:19,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 21:54:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-06-05 21:54:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-05 21:54:19,710 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-05 21:54:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:19,710 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-05 21:54:19,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-05 21:54:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:19,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:19,710 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:19,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-06-05 21:54:19,910 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -880588439, now seen corresponding path program 364 times [2021-06-05 21:54:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:19,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575387312] [2021-06-05 21:54:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:20,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:20,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575387312] [2021-06-05 21:54:20,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575387312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:20,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818978758] [2021-06-05 21:54:20,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:20,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:20,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:20,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818978758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:20,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:20,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:20,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838076641] [2021-06-05 21:54:20,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:20,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:20,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:20,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:20,296 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:20,502 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-06-05 21:54:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:20,502 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:54:20,502 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:54:20,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:54:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-06-05 21:54:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-06-05 21:54:20,504 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-06-05 21:54:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:20,504 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-06-05 21:54:20,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-06-05 21:54:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:20,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:20,505 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:20,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:20,720 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -593038204, now seen corresponding path program 365 times [2021-06-05 21:54:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:20,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957599114] [2021-06-05 21:54:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:20,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:20,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957599114] [2021-06-05 21:54:20,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957599114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:20,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469148177] [2021-06-05 21:54:20,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:20,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:21,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469148177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:21,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:21,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341231078] [2021-06-05 21:54:21,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:21,039 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:21,375 INFO L93 Difference]: Finished difference Result 261 states and 565 transitions. [2021-06-05 21:54:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:21,376 INFO L225 Difference]: With dead ends: 261 [2021-06-05 21:54:21,376 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:54:21,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:54:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 211. [2021-06-05 21:54:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2476190476190476) internal successors, (472), 210 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 472 transitions. [2021-06-05 21:54:21,378 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 472 transitions. Word has length 19 [2021-06-05 21:54:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:21,378 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 472 transitions. [2021-06-05 21:54:21,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 472 transitions. [2021-06-05 21:54:21,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:21,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:21,378 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:21,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-06-05 21:54:21,578 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash -291047924, now seen corresponding path program 366 times [2021-06-05 21:54:21,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:21,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116139748] [2021-06-05 21:54:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:21,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:21,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116139748] [2021-06-05 21:54:21,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116139748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:21,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262953059] [2021-06-05 21:54:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:21,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:21,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:21,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262953059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:21,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:21,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:21,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495708804] [2021-06-05 21:54:21,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:21,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:21,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:21,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:21,910 INFO L87 Difference]: Start difference. First operand 211 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:22,143 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-06-05 21:54:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:22,143 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:54:22,144 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:54:22,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:54:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 207. [2021-06-05 21:54:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-06-05 21:54:22,145 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-06-05 21:54:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:22,145 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-06-05 21:54:22,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-06-05 21:54:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:22,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:22,146 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:22,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2785,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:22,346 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:22,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1931243919, now seen corresponding path program 367 times [2021-06-05 21:54:22,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:22,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558139977] [2021-06-05 21:54:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:22,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:22,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558139977] [2021-06-05 21:54:22,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558139977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:22,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405512134] [2021-06-05 21:54:22,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:22,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:22,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405512134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:22,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:22,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:22,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265388826] [2021-06-05 21:54:22,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:22,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:22,718 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:22,951 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-06-05 21:54:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:54:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:22,952 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:54:22,952 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:54:22,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:54:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-06-05 21:54:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-06-05 21:54:22,956 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-06-05 21:54:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:22,957 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-06-05 21:54:22,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-06-05 21:54:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:22,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:22,957 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:23,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:23,157 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2076173142, now seen corresponding path program 368 times [2021-06-05 21:54:23,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:23,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069786068] [2021-06-05 21:54:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:23,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:23,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069786068] [2021-06-05 21:54:23,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069786068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:23,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865036807] [2021-06-05 21:54:23,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:23,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:23,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865036807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:23,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:23,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:23,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783631117] [2021-06-05 21:54:23,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:23,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:23,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:23,459 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:24,007 INFO L93 Difference]: Finished difference Result 280 states and 603 transitions. [2021-06-05 21:54:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:24,008 INFO L225 Difference]: With dead ends: 280 [2021-06-05 21:54:24,008 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 21:54:24,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 574.9ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 21:54:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 212. [2021-06-05 21:54:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-06-05 21:54:24,010 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-06-05 21:54:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:24,010 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-06-05 21:54:24,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-06-05 21:54:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:24,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:24,011 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:24,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2798,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:24,226 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1774182862, now seen corresponding path program 369 times [2021-06-05 21:54:24,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:24,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534376858] [2021-06-05 21:54:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:24,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:24,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534376858] [2021-06-05 21:54:24,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534376858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:24,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779650584] [2021-06-05 21:54:24,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:24,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:24,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:24,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779650584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:24,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:24,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:24,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965419517] [2021-06-05 21:54:24,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:24,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:24,546 INFO L87 Difference]: Start difference. First operand 212 states and 475 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:25,006 INFO L93 Difference]: Finished difference Result 252 states and 553 transitions. [2021-06-05 21:54:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:25,007 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:54:25,007 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:54:25,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:54:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 211. [2021-06-05 21:54:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-05 21:54:25,009 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-05 21:54:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:25,009 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-05 21:54:25,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-05 21:54:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:25,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:25,009 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:25,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:25,210 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1267836596, now seen corresponding path program 370 times [2021-06-05 21:54:25,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:25,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505324425] [2021-06-05 21:54:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:25,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:25,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505324425] [2021-06-05 21:54:25,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505324425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:25,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132059593] [2021-06-05 21:54:25,310 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:25,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:25,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:25,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:25,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132059593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:25,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:25,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:25,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561487918] [2021-06-05 21:54:25,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:25,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:25,506 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:25,710 INFO L93 Difference]: Finished difference Result 243 states and 533 transitions. [2021-06-05 21:54:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:25,710 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:54:25,710 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 21:54:25,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 21:54:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 206. [2021-06-05 21:54:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 21:54:25,712 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-05 21:54:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:25,712 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 21:54:25,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 21:54:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:25,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:25,713 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:25,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-06-05 21:54:25,913 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1096266199, now seen corresponding path program 371 times [2021-06-05 21:54:25,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:25,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668500882] [2021-06-05 21:54:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:26,007 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 21:54:26,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:26,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668500882] [2021-06-05 21:54:26,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668500882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:26,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520711870] [2021-06-05 21:54:26,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:26,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:26,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:26,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520711870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:26,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:26,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:26,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468178933] [2021-06-05 21:54:26,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:26,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:26,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:26,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:26,308 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:26,628 INFO L93 Difference]: Finished difference Result 228 states and 503 transitions. [2021-06-05 21:54:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:26,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:26,629 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:54:26,629 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:54:26,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:26,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:54:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-06-05 21:54:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-06-05 21:54:26,631 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-06-05 21:54:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:26,631 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-06-05 21:54:26,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-06-05 21:54:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:26,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:26,631 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:26,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2815,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:26,831 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -808715964, now seen corresponding path program 372 times [2021-06-05 21:54:26,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:26,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559240568] [2021-06-05 21:54:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:26,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:26,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559240568] [2021-06-05 21:54:26,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559240568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:26,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714404643] [2021-06-05 21:54:26,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:26,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:26,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:26,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:27,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714404643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:27,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:27,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:27,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116088743] [2021-06-05 21:54:27,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:27,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:27,159 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:27,928 INFO L93 Difference]: Finished difference Result 276 states and 595 transitions. [2021-06-05 21:54:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:27,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:27,929 INFO L225 Difference]: With dead ends: 276 [2021-06-05 21:54:27,929 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 21:54:27,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:54:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 21:54:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 213. [2021-06-05 21:54:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-06-05 21:54:27,931 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-06-05 21:54:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:27,931 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-06-05 21:54:27,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-06-05 21:54:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:27,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:27,932 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:28,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2823 [2021-06-05 21:54:28,132 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash -506725684, now seen corresponding path program 373 times [2021-06-05 21:54:28,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:28,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990628537] [2021-06-05 21:54:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:28,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:28,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990628537] [2021-06-05 21:54:28,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990628537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:28,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380071725] [2021-06-05 21:54:28,225 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:28,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:28,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380071725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:28,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:28,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:28,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483205405] [2021-06-05 21:54:28,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:28,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:28,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:28,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:28,449 INFO L87 Difference]: Start difference. First operand 213 states and 478 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:29,088 INFO L93 Difference]: Finished difference Result 265 states and 579 transitions. [2021-06-05 21:54:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:29,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:29,088 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:54:29,088 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 21:54:29,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 682.8ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:54:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 21:54:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-06-05 21:54:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-06-05 21:54:29,090 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-06-05 21:54:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:29,090 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-06-05 21:54:29,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-06-05 21:54:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:29,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:29,091 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:29,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2830 [2021-06-05 21:54:29,291 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -379418, now seen corresponding path program 374 times [2021-06-05 21:54:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:29,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944651874] [2021-06-05 21:54:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:29,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:29,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944651874] [2021-06-05 21:54:29,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944651874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:29,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638352529] [2021-06-05 21:54:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:29,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:29,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:29,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:29,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638352529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:29,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:29,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209534547] [2021-06-05 21:54:29,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:29,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:29,602 INFO L87 Difference]: Start difference. First operand 212 states and 476 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:30,140 INFO L93 Difference]: Finished difference Result 259 states and 568 transitions. [2021-06-05 21:54:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:30,141 INFO L225 Difference]: With dead ends: 259 [2021-06-05 21:54:30,141 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 21:54:30,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:54:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 21:54:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2021-06-05 21:54:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.257142857142857) internal successors, (474), 210 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 474 transitions. [2021-06-05 21:54:30,143 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 474 transitions. Word has length 19 [2021-06-05 21:54:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:30,143 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 474 transitions. [2021-06-05 21:54:30,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 474 transitions. [2021-06-05 21:54:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:30,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:30,143 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:30,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2835,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:30,344 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:30,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1483514356, now seen corresponding path program 375 times [2021-06-05 21:54:30,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:30,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32811810] [2021-06-05 21:54:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:30,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32811810] [2021-06-05 21:54:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32811810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:30,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327912177] [2021-06-05 21:54:30,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:30,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:30,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:30,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:30,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:30,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327912177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:30,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:30,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:30,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66084184] [2021-06-05 21:54:30,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:30,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:30,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:30,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:30,637 INFO L87 Difference]: Start difference. First operand 211 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:30,940 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-06-05 21:54:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:30,941 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:54:30,941 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 21:54:30,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 21:54:30,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 208. [2021-06-05 21:54:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-06-05 21:54:30,943 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-06-05 21:54:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:30,943 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-06-05 21:54:30,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-06-05 21:54:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:30,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:30,943 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:31,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-06-05 21:54:31,143 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1717344001, now seen corresponding path program 376 times [2021-06-05 21:54:31,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:31,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576832635] [2021-06-05 21:54:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:31,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:31,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576832635] [2021-06-05 21:54:31,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576832635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:31,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226148588] [2021-06-05 21:54:31,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:31,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:31,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226148588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:31,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:31,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:31,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538862621] [2021-06-05 21:54:31,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:31,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:31,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:31,421 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:31,658 INFO L93 Difference]: Finished difference Result 220 states and 488 transitions. [2021-06-05 21:54:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:31,658 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:54:31,659 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:54:31,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:54:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-06-05 21:54:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-06-05 21:54:31,660 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-06-05 21:54:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:31,660 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-06-05 21:54:31,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-06-05 21:54:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:31,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:31,661 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:31,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:31,877 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash -558465017, now seen corresponding path program 377 times [2021-06-05 21:54:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:31,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805057969] [2021-06-05 21:54:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:31,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:31,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805057969] [2021-06-05 21:54:31,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805057969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:31,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182463601] [2021-06-05 21:54:31,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:31,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:54:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182463601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:32,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:32,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270778958] [2021-06-05 21:54:32,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:32,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:32,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:32,156 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:32,570 INFO L93 Difference]: Finished difference Result 236 states and 520 transitions. [2021-06-05 21:54:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:32,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:32,572 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:54:32,572 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:54:32,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:54:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:54:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-06-05 21:54:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-06-05 21:54:32,574 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-06-05 21:54:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:32,574 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-06-05 21:54:32,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-06-05 21:54:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:32,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:32,574 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:32,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-06-05 21:54:32,777 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1629460481, now seen corresponding path program 378 times [2021-06-05 21:54:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:32,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259726101] [2021-06-05 21:54:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:32,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:32,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259726101] [2021-06-05 21:54:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259726101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:32,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478350158] [2021-06-05 21:54:32,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:32,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:32,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:32,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:33,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478350158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:33,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:33,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:33,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578018006] [2021-06-05 21:54:33,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:33,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:33,076 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:33,588 INFO L93 Difference]: Finished difference Result 244 states and 534 transitions. [2021-06-05 21:54:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:33,589 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:54:33,589 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:54:33,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:54:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:54:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 209. [2021-06-05 21:54:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-06-05 21:54:33,591 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-06-05 21:54:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:33,591 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-06-05 21:54:33,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-06-05 21:54:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:33,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:33,591 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:33,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2855,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:33,792 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -832724729, now seen corresponding path program 379 times [2021-06-05 21:54:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:33,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730743152] [2021-06-05 21:54:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:33,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:33,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730743152] [2021-06-05 21:54:33,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730743152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:33,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584063987] [2021-06-05 21:54:33,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:34,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584063987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:34,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:34,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:34,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677414398] [2021-06-05 21:54:34,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:34,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:34,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:34,074 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:34,931 INFO L93 Difference]: Finished difference Result 277 states and 586 transitions. [2021-06-05 21:54:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:54:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:34,932 INFO L225 Difference]: With dead ends: 277 [2021-06-05 21:54:34,932 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 21:54:34,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:54:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 21:54:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-06-05 21:54:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-05 21:54:34,934 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-05 21:54:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:34,934 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-05 21:54:34,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-05 21:54:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:34,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:34,935 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:35,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2860 [2021-06-05 21:54:35,135 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:35,135 INFO L82 PathProgramCache]: Analyzing trace with hash 294671364, now seen corresponding path program 380 times [2021-06-05 21:54:35,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:35,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252971200] [2021-06-05 21:54:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:35,219 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 21:54:35,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:35,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252971200] [2021-06-05 21:54:35,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252971200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:35,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017455041] [2021-06-05 21:54:35,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:35,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:35,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:35,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017455041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:35,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:35,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:35,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431599200] [2021-06-05 21:54:35,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:35,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:35,481 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:35,787 INFO L93 Difference]: Finished difference Result 227 states and 500 transitions. [2021-06-05 21:54:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:35,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:35,788 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:54:35,788 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 21:54:35,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 21:54:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2021-06-05 21:54:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-06-05 21:54:35,790 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-06-05 21:54:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:35,790 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-06-05 21:54:35,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-06-05 21:54:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:35,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:35,790 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:36,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-05 21:54:36,005 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 708992161, now seen corresponding path program 381 times [2021-06-05 21:54:36,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:36,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192295319] [2021-06-05 21:54:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:36,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:36,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192295319] [2021-06-05 21:54:36,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192295319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:36,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337081213] [2021-06-05 21:54:36,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:36,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:54:36,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:36,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:36,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337081213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:36,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:36,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:36,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79283628] [2021-06-05 21:54:36,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:36,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:36,292 INFO L87 Difference]: Start difference. First operand 206 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:36,537 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-06-05 21:54:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:36,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:36,537 INFO L225 Difference]: With dead ends: 229 [2021-06-05 21:54:36,538 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 21:54:36,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 21:54:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 206. [2021-06-05 21:54:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-06-05 21:54:36,539 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-06-05 21:54:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:36,539 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-06-05 21:54:36,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-06-05 21:54:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:36,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:36,540 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:36,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:36,740 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:36,740 INFO L82 PathProgramCache]: Analyzing trace with hash -837134980, now seen corresponding path program 382 times [2021-06-05 21:54:36,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:36,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534249516] [2021-06-05 21:54:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:36,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:36,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534249516] [2021-06-05 21:54:36,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534249516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:36,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789734535] [2021-06-05 21:54:36,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:36,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:36,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:37,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789734535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:37,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:37,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:37,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457384137] [2021-06-05 21:54:37,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:37,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:37,068 INFO L87 Difference]: Start difference. First operand 206 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:37,279 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2021-06-05 21:54:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:37,279 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:54:37,280 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 21:54:37,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 372.9ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 21:54:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-06-05 21:54:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 21:54:37,281 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-05 21:54:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:37,281 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 21:54:37,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 21:54:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:37,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:37,282 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:37,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2880,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:37,482 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash -362003303, now seen corresponding path program 383 times [2021-06-05 21:54:37,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:37,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184316157] [2021-06-05 21:54:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:37,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:37,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184316157] [2021-06-05 21:54:37,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184316157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:37,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178516036] [2021-06-05 21:54:37,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:37,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:37,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:37,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178516036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:37,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:37,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:37,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042753873] [2021-06-05 21:54:37,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:37,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:37,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:37,783 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:38,198 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-06-05 21:54:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:38,199 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:54:38,199 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 21:54:38,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 21:54:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2021-06-05 21:54:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-06-05 21:54:38,201 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-06-05 21:54:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:38,201 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-06-05 21:54:38,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-06-05 21:54:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:38,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:38,201 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:38,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:38,401 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1562128542, now seen corresponding path program 384 times [2021-06-05 21:54:38,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:38,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553419172] [2021-06-05 21:54:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:38,499 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 21:54:38,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:38,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553419172] [2021-06-05 21:54:38,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553419172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:38,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729443339] [2021-06-05 21:54:38,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:38,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:54:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:38,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729443339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:38,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:38,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:38,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663572398] [2021-06-05 21:54:38,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:38,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:38,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:38,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:38,743 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:38,961 INFO L93 Difference]: Finished difference Result 220 states and 487 transitions. [2021-06-05 21:54:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:54:38,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:38,962 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:54:38,962 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:54:38,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:54:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-06-05 21:54:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-05 21:54:38,963 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-05 21:54:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:38,964 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-05 21:54:38,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-05 21:54:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:38,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:38,964 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:39,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-06-05 21:54:39,169 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1845138241, now seen corresponding path program 385 times [2021-06-05 21:54:39,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:39,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783372565] [2021-06-05 21:54:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:39,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:39,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783372565] [2021-06-05 21:54:39,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783372565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:39,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122793614] [2021-06-05 21:54:39,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:39,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:39,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122793614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:39,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:39,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:39,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811575531] [2021-06-05 21:54:39,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:39,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:39,518 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:39,795 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-06-05 21:54:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:39,796 INFO L225 Difference]: With dead ends: 229 [2021-06-05 21:54:39,796 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 21:54:39,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 21:54:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2021-06-05 21:54:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-05 21:54:39,798 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-05 21:54:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:39,798 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-05 21:54:39,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-05 21:54:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:39,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:39,798 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:39,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2900,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:39,998 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1048402489, now seen corresponding path program 386 times [2021-06-05 21:54:39,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:39,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424819391] [2021-06-05 21:54:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:40,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:40,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424819391] [2021-06-05 21:54:40,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424819391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:40,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539877243] [2021-06-05 21:54:40,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:40,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:40,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:40,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:40,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539877243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:40,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:40,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:40,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290455111] [2021-06-05 21:54:40,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:40,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:40,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:40,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:40,307 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:40,619 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-06-05 21:54:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:40,619 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:54:40,619 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:54:40,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:54:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-06-05 21:54:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-05 21:54:40,621 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-05 21:54:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:40,621 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-05 21:54:40,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-05 21:54:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:40,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:40,621 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:40,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2908 [2021-06-05 21:54:40,822 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash -760852254, now seen corresponding path program 387 times [2021-06-05 21:54:40,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:40,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612330830] [2021-06-05 21:54:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:40,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612330830] [2021-06-05 21:54:40,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612330830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599968980] [2021-06-05 21:54:40,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:40,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:41,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599968980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:41,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:41,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:41,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400269987] [2021-06-05 21:54:41,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:41,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:41,172 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:41,346 INFO L93 Difference]: Finished difference Result 219 states and 483 transitions. [2021-06-05 21:54:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:41,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:41,347 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:54:41,347 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:54:41,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:54:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 205. [2021-06-05 21:54:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.230392156862745) internal successors, (455), 204 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 455 transitions. [2021-06-05 21:54:41,349 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 455 transitions. Word has length 19 [2021-06-05 21:54:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:41,349 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 455 transitions. [2021-06-05 21:54:41,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 455 transitions. [2021-06-05 21:54:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:41,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:41,349 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:41,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:41,549 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 585339870, now seen corresponding path program 388 times [2021-06-05 21:54:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:41,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544257180] [2021-06-05 21:54:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:41,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:41,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544257180] [2021-06-05 21:54:41,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544257180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:41,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144659204] [2021-06-05 21:54:41,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:41,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:41,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:41,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:41,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144659204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:41,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:41,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:41,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988145527] [2021-06-05 21:54:41,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:41,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:41,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:41,854 INFO L87 Difference]: Start difference. First operand 205 states and 455 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:42,150 INFO L93 Difference]: Finished difference Result 297 states and 613 transitions. [2021-06-05 21:54:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:42,150 INFO L225 Difference]: With dead ends: 297 [2021-06-05 21:54:42,150 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 21:54:42,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 21:54:42,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 207. [2021-06-05 21:54:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2427184466019416) internal successors, (462), 206 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 462 transitions. [2021-06-05 21:54:42,153 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 462 transitions. Word has length 19 [2021-06-05 21:54:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:42,153 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 462 transitions. [2021-06-05 21:54:42,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 462 transitions. [2021-06-05 21:54:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:42,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:42,153 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:42,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:42,353 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2080425983, now seen corresponding path program 389 times [2021-06-05 21:54:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:42,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044466340] [2021-06-05 21:54:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:42,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:42,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044466340] [2021-06-05 21:54:42,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044466340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:42,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620186569] [2021-06-05 21:54:42,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:42,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:54:42,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:42,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:42,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:42,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620186569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:42,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:42,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:42,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088982632] [2021-06-05 21:54:42,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:42,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:42,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:42,737 INFO L87 Difference]: Start difference. First operand 207 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:42,895 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2021-06-05 21:54:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:42,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:42,895 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:54:42,895 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 21:54:42,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 21:54:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-06-05 21:54:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2289719626168223) internal successors, (477), 214 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 477 transitions. [2021-06-05 21:54:42,897 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 477 transitions. Word has length 19 [2021-06-05 21:54:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:42,897 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 477 transitions. [2021-06-05 21:54:42,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 477 transitions. [2021-06-05 21:54:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:42,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:42,898 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:43,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-06-05 21:54:43,098 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:43,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:43,098 INFO L82 PathProgramCache]: Analyzing trace with hash 47484292, now seen corresponding path program 390 times [2021-06-05 21:54:43,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:43,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52726827] [2021-06-05 21:54:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:43,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:43,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52726827] [2021-06-05 21:54:43,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52726827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:43,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086136022] [2021-06-05 21:54:43,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:43,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:54:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:43,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:43,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086136022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:43,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:43,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:43,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066194102] [2021-06-05 21:54:43,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:43,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:43,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:43,411 INFO L87 Difference]: Start difference. First operand 215 states and 477 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:43,551 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2021-06-05 21:54:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:43,551 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:54:43,551 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:54:43,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:54:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2021-06-05 21:54:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-06-05 21:54:43,553 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-06-05 21:54:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:43,553 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-06-05 21:54:43,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-06-05 21:54:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:43,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:43,554 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:43,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:43,754 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:43,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1345459015, now seen corresponding path program 391 times [2021-06-05 21:54:43,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:43,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094423501] [2021-06-05 21:54:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:43,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:43,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094423501] [2021-06-05 21:54:43,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094423501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:43,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489681861] [2021-06-05 21:54:43,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:44,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489681861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:44,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:44,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:44,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100531041] [2021-06-05 21:54:44,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:44,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:44,053 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:44,272 INFO L93 Difference]: Finished difference Result 234 states and 512 transitions. [2021-06-05 21:54:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:44,273 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:54:44,273 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:54:44,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:54:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-06-05 21:54:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-06-05 21:54:44,275 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-06-05 21:54:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:44,275 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-06-05 21:54:44,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-06-05 21:54:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:44,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:44,275 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:44,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2943 [2021-06-05 21:54:44,475 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:44,476 INFO L82 PathProgramCache]: Analyzing trace with hash 274463551, now seen corresponding path program 392 times [2021-06-05 21:54:44,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:44,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152661959] [2021-06-05 21:54:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:44,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152661959] [2021-06-05 21:54:44,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152661959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178224517] [2021-06-05 21:54:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:44,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178224517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:44,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:44,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:44,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896569448] [2021-06-05 21:54:44,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:44,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:44,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:44,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:44,780 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:45,205 INFO L93 Difference]: Finished difference Result 246 states and 536 transitions. [2021-06-05 21:54:45,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:45,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:45,206 INFO L225 Difference]: With dead ends: 246 [2021-06-05 21:54:45,206 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 21:54:45,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:54:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 21:54:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 214. [2021-06-05 21:54:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-06-05 21:54:45,208 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-06-05 21:54:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:45,208 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-06-05 21:54:45,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-06-05 21:54:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:45,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:45,208 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:45,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:45,408 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2096371900, now seen corresponding path program 393 times [2021-06-05 21:54:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:45,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974033338] [2021-06-05 21:54:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:45,503 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 21:54:45,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:45,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974033338] [2021-06-05 21:54:45,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974033338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:45,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082664876] [2021-06-05 21:54:45,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:45,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:45,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:45,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:45,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082664876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:45,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:45,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:45,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770123690] [2021-06-05 21:54:45,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:45,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:45,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:45,764 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:46,008 INFO L93 Difference]: Finished difference Result 227 states and 498 transitions. [2021-06-05 21:54:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:46,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:46,009 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:54:46,009 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:54:46,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:54:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-06-05 21:54:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-06-05 21:54:46,011 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-06-05 21:54:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:46,011 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-06-05 21:54:46,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-06-05 21:54:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:46,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:46,011 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:46,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-06-05 21:54:46,211 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1208671387, now seen corresponding path program 394 times [2021-06-05 21:54:46,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:46,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525737838] [2021-06-05 21:54:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:46,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:46,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525737838] [2021-06-05 21:54:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525737838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:46,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220891271] [2021-06-05 21:54:46,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:46,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:46,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:46,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220891271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:46,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:46,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:46,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57445193] [2021-06-05 21:54:46,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:46,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:46,530 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:46,754 INFO L93 Difference]: Finished difference Result 235 states and 514 transitions. [2021-06-05 21:54:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:46,754 INFO L225 Difference]: With dead ends: 235 [2021-06-05 21:54:46,754 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 21:54:46,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 21:54:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 213. [2021-06-05 21:54:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-06-05 21:54:46,756 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-06-05 21:54:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:46,756 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-06-05 21:54:46,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-06-05 21:54:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:46,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:46,757 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:46,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2962,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:46,960 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash -411935635, now seen corresponding path program 395 times [2021-06-05 21:54:46,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:46,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025262599] [2021-06-05 21:54:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:47,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025262599] [2021-06-05 21:54:47,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025262599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086008727] [2021-06-05 21:54:47,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:47,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:47,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:47,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:47,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086008727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:47,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:47,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:47,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553534007] [2021-06-05 21:54:47,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:47,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:47,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:47,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:47,284 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:47,603 INFO L93 Difference]: Finished difference Result 248 states and 540 transitions. [2021-06-05 21:54:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:47,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:47,603 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:54:47,603 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 21:54:47,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 21:54:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 214. [2021-06-05 21:54:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-06-05 21:54:47,605 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-06-05 21:54:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:47,605 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-06-05 21:54:47,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-06-05 21:54:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:47,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:47,606 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:47,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:47,806 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash -124385400, now seen corresponding path program 396 times [2021-06-05 21:54:47,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:47,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875416637] [2021-06-05 21:54:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:47,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:47,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875416637] [2021-06-05 21:54:47,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875416637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:47,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236049490] [2021-06-05 21:54:47,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:47,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:47,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:48,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236049490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:48,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:48,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:48,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104913466] [2021-06-05 21:54:48,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:48,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:48,158 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:48,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:48,374 INFO L93 Difference]: Finished difference Result 228 states and 502 transitions. [2021-06-05 21:54:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:48,375 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:54:48,375 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:54:48,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:54:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2021-06-05 21:54:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-06-05 21:54:48,376 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-06-05 21:54:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:48,377 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-06-05 21:54:48,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-06-05 21:54:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:48,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:48,377 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:48,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-05 21:54:48,577 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash -745435227, now seen corresponding path program 397 times [2021-06-05 21:54:48,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:48,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473596289] [2021-06-05 21:54:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:48,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473596289] [2021-06-05 21:54:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473596289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883063788] [2021-06-05 21:54:48,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:48,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883063788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:48,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:48,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:48,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513851896] [2021-06-05 21:54:48,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:48,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:48,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:48,954 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:49,261 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-06-05 21:54:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:49,261 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:49,261 INFO L225 Difference]: With dead ends: 240 [2021-06-05 21:54:49,261 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 21:54:49,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 21:54:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 213. [2021-06-05 21:54:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.202830188679245) internal successors, (467), 212 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 467 transitions. [2021-06-05 21:54:49,263 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 467 transitions. Word has length 19 [2021-06-05 21:54:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:49,263 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 467 transitions. [2021-06-05 21:54:49,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 467 transitions. [2021-06-05 21:54:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:49,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:49,264 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:49,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-05 21:54:49,464 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1221806724, now seen corresponding path program 398 times [2021-06-05 21:54:49,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:49,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110244986] [2021-06-05 21:54:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:49,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110244986] [2021-06-05 21:54:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110244986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339079144] [2021-06-05 21:54:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:49,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:49,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:49,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339079144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:49,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:49,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:49,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438302002] [2021-06-05 21:54:49,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:49,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:49,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:49,790 INFO L87 Difference]: Start difference. First operand 213 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:49,997 INFO L93 Difference]: Finished difference Result 280 states and 590 transitions. [2021-06-05 21:54:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:49,997 INFO L225 Difference]: With dead ends: 280 [2021-06-05 21:54:49,998 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 21:54:49,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 21:54:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-06-05 21:54:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2149532710280373) internal successors, (474), 214 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 474 transitions. [2021-06-05 21:54:50,000 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 474 transitions. Word has length 19 [2021-06-05 21:54:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:50,000 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 474 transitions. [2021-06-05 21:54:50,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 474 transitions. [2021-06-05 21:54:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:50,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:50,000 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:50,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:50,200 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1578074459, now seen corresponding path program 399 times [2021-06-05 21:54:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:50,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601026569] [2021-06-05 21:54:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:50,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:50,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601026569] [2021-06-05 21:54:50,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601026569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:50,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006813011] [2021-06-05 21:54:50,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:50,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:50,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:50,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:50,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006813011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:50,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:50,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:50,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476427622] [2021-06-05 21:54:50,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:50,580 INFO L87 Difference]: Start difference. First operand 215 states and 474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:50,747 INFO L93 Difference]: Finished difference Result 225 states and 490 transitions. [2021-06-05 21:54:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:54:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:50,747 INFO L225 Difference]: With dead ends: 225 [2021-06-05 21:54:50,747 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:54:50,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:54:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2021-06-05 21:54:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-06-05 21:54:50,749 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-06-05 21:54:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:50,749 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-06-05 21:54:50,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-06-05 21:54:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:50,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:50,749 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:50,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-06-05 21:54:50,950 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash 683951146, now seen corresponding path program 400 times [2021-06-05 21:54:50,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:50,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599729520] [2021-06-05 21:54:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:51,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:51,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599729520] [2021-06-05 21:54:51,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599729520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:51,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269143141] [2021-06-05 21:54:51,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:51,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:51,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269143141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:51,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:51,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:51,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359537117] [2021-06-05 21:54:51,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:51,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:51,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:51,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:51,268 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:51,431 INFO L93 Difference]: Finished difference Result 238 states and 517 transitions. [2021-06-05 21:54:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:51,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:51,432 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:54:51,432 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:54:51,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:54:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 208. [2021-06-05 21:54:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-06-05 21:54:51,434 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-06-05 21:54:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:51,434 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-06-05 21:54:51,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-06-05 21:54:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:51,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:51,434 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:51,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:51,634 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash 58785791, now seen corresponding path program 401 times [2021-06-05 21:54:51,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:51,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995718259] [2021-06-05 21:54:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:51,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995718259] [2021-06-05 21:54:51,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995718259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722155287] [2021-06-05 21:54:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:51,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:54:51,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:51,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:51,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:52,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722155287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:52,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:52,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:52,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546958957] [2021-06-05 21:54:52,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:52,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:52,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:52,004 INFO L87 Difference]: Start difference. First operand 208 states and 457 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:52,181 INFO L93 Difference]: Finished difference Result 236 states and 513 transitions. [2021-06-05 21:54:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:52,181 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:54:52,181 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:54:52,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:54:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-06-05 21:54:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-06-05 21:54:52,183 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-06-05 21:54:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:52,183 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-06-05 21:54:52,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-06-05 21:54:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:52,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:52,183 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:52,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3010 [2021-06-05 21:54:52,384 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:52,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1982917636, now seen corresponding path program 402 times [2021-06-05 21:54:52,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:52,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514199356] [2021-06-05 21:54:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:52,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:52,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514199356] [2021-06-05 21:54:52,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514199356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:52,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838737792] [2021-06-05 21:54:52,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:52,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:54:52,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:54:52,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:52,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838737792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:52,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:52,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:54:52,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517919201] [2021-06-05 21:54:52,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:52,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:52,740 INFO L87 Difference]: Start difference. First operand 208 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:53,343 INFO L93 Difference]: Finished difference Result 317 states and 654 transitions. [2021-06-05 21:54:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:54:53,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:53,344 INFO L225 Difference]: With dead ends: 317 [2021-06-05 21:54:53,344 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 21:54:53,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:54:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 21:54:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 210. [2021-06-05 21:54:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.229665071770335) internal successors, (466), 209 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 466 transitions. [2021-06-05 21:54:53,346 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 466 transitions. Word has length 19 [2021-06-05 21:54:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:53,346 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 466 transitions. [2021-06-05 21:54:53,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 466 transitions. [2021-06-05 21:54:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:53,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:53,346 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:53,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:53,547 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1154672572, now seen corresponding path program 403 times [2021-06-05 21:54:53,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:53,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565446184] [2021-06-05 21:54:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:53,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:53,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565446184] [2021-06-05 21:54:53,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565446184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:53,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881745943] [2021-06-05 21:54:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:53,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881745943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:53,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:53,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753243381] [2021-06-05 21:54:53,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:53,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:53,937 INFO L87 Difference]: Start difference. First operand 210 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:54,342 INFO L93 Difference]: Finished difference Result 255 states and 545 transitions. [2021-06-05 21:54:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:54,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:54,343 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:54:54,343 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 21:54:54,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 21:54:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-06-05 21:54:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.22488038277512) internal successors, (465), 209 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 465 transitions. [2021-06-05 21:54:54,345 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 465 transitions. Word has length 19 [2021-06-05 21:54:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:54,345 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 465 transitions. [2021-06-05 21:54:54,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 465 transitions. [2021-06-05 21:54:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:54,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:54,345 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:54,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-06-05 21:54:54,545 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:54,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1805703394, now seen corresponding path program 404 times [2021-06-05 21:54:54,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:54,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594700739] [2021-06-05 21:54:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:54,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:54,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594700739] [2021-06-05 21:54:54,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594700739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:54,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882322922] [2021-06-05 21:54:54,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:54,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:54,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:54,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:54,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882322922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:54,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:54,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:54,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625883974] [2021-06-05 21:54:54,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:54,869 INFO L87 Difference]: Start difference. First operand 210 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:55,275 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-06-05 21:54:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:55,275 INFO L225 Difference]: With dead ends: 265 [2021-06-05 21:54:55,275 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 21:54:55,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 21:54:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 209. [2021-06-05 21:54:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-06-05 21:54:55,277 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-06-05 21:54:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:55,277 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-06-05 21:54:55,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-06-05 21:54:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:55,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:55,278 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:55,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3028 [2021-06-05 21:54:55,481 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1951408324, now seen corresponding path program 405 times [2021-06-05 21:54:55,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:55,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95736736] [2021-06-05 21:54:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:55,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95736736] [2021-06-05 21:54:55,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95736736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:55,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336300312] [2021-06-05 21:54:55,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:55,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:55,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:55,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336300312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:55,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:55,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:55,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643915784] [2021-06-05 21:54:55,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:55,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:55,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:55,802 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:56,041 INFO L93 Difference]: Finished difference Result 237 states and 514 transitions. [2021-06-05 21:54:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:56,042 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:54:56,042 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:54:56,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:54:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2021-06-05 21:54:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.203883495145631) internal successors, (454), 206 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 454 transitions. [2021-06-05 21:54:56,044 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 454 transitions. Word has length 19 [2021-06-05 21:54:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:56,044 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 454 transitions. [2021-06-05 21:54:56,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 454 transitions. [2021-06-05 21:54:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:56,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:56,044 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:56,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:56,245 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1006128964, now seen corresponding path program 406 times [2021-06-05 21:54:56,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:56,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372205600] [2021-06-05 21:54:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:56,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:56,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372205600] [2021-06-05 21:54:56,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372205600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:56,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599289827] [2021-06-05 21:54:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:56,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:56,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:56,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599289827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:56,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:56,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777950857] [2021-06-05 21:54:56,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:56,552 INFO L87 Difference]: Start difference. First operand 207 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:57,086 INFO L93 Difference]: Finished difference Result 294 states and 611 transitions. [2021-06-05 21:54:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:54:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:57,087 INFO L225 Difference]: With dead ends: 294 [2021-06-05 21:54:57,087 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 21:54:57,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 21:54:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 209. [2021-06-05 21:54:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2211538461538463) internal successors, (462), 208 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 462 transitions. [2021-06-05 21:54:57,089 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 462 transitions. Word has length 19 [2021-06-05 21:54:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:57,089 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 462 transitions. [2021-06-05 21:54:57,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 462 transitions. [2021-06-05 21:54:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:57,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:57,089 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:57,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-05 21:54:57,290 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash 468273386, now seen corresponding path program 407 times [2021-06-05 21:54:57,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:57,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783127276] [2021-06-05 21:54:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:57,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:57,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783127276] [2021-06-05 21:54:57,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783127276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:57,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124047037] [2021-06-05 21:54:57,388 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 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:57,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:57,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:57,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:57,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124047037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:57,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:57,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:57,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285127477] [2021-06-05 21:54:57,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:57,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:57,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:57,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:57,600 INFO L87 Difference]: Start difference. First operand 209 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:57,973 INFO L93 Difference]: Finished difference Result 247 states and 536 transitions. [2021-06-05 21:54:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:57,974 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:54:57,974 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:54:57,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:54:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208. [2021-06-05 21:54:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2222222222222223) internal successors, (460), 207 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 460 transitions. [2021-06-05 21:54:57,976 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 460 transitions. Word has length 19 [2021-06-05 21:54:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:57,976 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 460 transitions. [2021-06-05 21:54:57,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 460 transitions. [2021-06-05 21:54:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:57,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:57,976 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:58,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:58,176 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:58,177 INFO L82 PathProgramCache]: Analyzing trace with hash 974619652, now seen corresponding path program 408 times [2021-06-05 21:54:58,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:58,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823427910] [2021-06-05 21:54:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:58,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:58,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823427910] [2021-06-05 21:54:58,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823427910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:58,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915406378] [2021-06-05 21:54:58,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:58,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915406378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:58,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861010908] [2021-06-05 21:54:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:58,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:58,518 INFO L87 Difference]: Start difference. First operand 208 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:58,711 INFO L93 Difference]: Finished difference Result 241 states and 522 transitions. [2021-06-05 21:54:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:58,712 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:54:58,712 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:54:58,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:54:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2021-06-05 21:54:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-05 21:54:58,714 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-05 21:54:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:58,714 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-05 21:54:58,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-05 21:54:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:58,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:58,714 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:58,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-06-05 21:54:58,915 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:58,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:58,915 INFO L82 PathProgramCache]: Analyzing trace with hash -398904991, now seen corresponding path program 409 times [2021-06-05 21:54:58,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:58,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153369529] [2021-06-05 21:54:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:59,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:59,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153369529] [2021-06-05 21:54:59,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153369529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:59,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064959145] [2021-06-05 21:54:59,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:59,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:54:59,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:59,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064959145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:59,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:59,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196599253] [2021-06-05 21:54:59,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:59,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:59,219 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:59,472 INFO L93 Difference]: Finished difference Result 226 states and 492 transitions. [2021-06-05 21:54:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:59,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:59,472 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:54:59,472 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:54:59,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:54:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 205. [2021-06-05 21:54:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-05 21:54:59,474 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-05 21:54:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:59,474 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-05 21:54:59,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-05 21:54:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:59,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:59,475 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:59,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:59,675 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:59,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1469900455, now seen corresponding path program 410 times [2021-06-05 21:54:59,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:59,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893303097] [2021-06-05 21:54:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:59,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:59,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893303097] [2021-06-05 21:54:59,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893303097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:59,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778563995] [2021-06-05 21:54:59,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:59,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:59,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:59,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:54:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778563995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:59,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:59,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:54:59,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563820522] [2021-06-05 21:54:59,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:54:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:54:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:54:59,988 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:00,443 INFO L93 Difference]: Finished difference Result 239 states and 518 transitions. [2021-06-05 21:55:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:00,443 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:55:00,443 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 21:55:00,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 21:55:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2021-06-05 21:55:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-05 21:55:00,445 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-05 21:55:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:00,445 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-05 21:55:00,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-05 21:55:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:00,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:00,446 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:00,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:00,646 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash -673164703, now seen corresponding path program 411 times [2021-06-05 21:55:00,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:00,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245791387] [2021-06-05 21:55:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:00,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245791387] [2021-06-05 21:55:00,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245791387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6340229] [2021-06-05 21:55:00,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:00,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:00,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6340229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:00,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:00,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:00,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187814202] [2021-06-05 21:55:00,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:00,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:00,963 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:01,522 INFO L93 Difference]: Finished difference Result 247 states and 534 transitions. [2021-06-05 21:55:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:01,522 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:55:01,522 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:55:01,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:55:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 205. [2021-06-05 21:55:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-05 21:55:01,524 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-05 21:55:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:01,524 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-05 21:55:01,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-05 21:55:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:01,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:01,525 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:01,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 21:55:01,725 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash -385614468, now seen corresponding path program 412 times [2021-06-05 21:55:01,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:01,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815097828] [2021-06-05 21:55:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:01,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:01,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815097828] [2021-06-05 21:55:01,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815097828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:01,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376552392] [2021-06-05 21:55:01,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:01,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:01,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376552392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:02,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:02,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:02,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100155762] [2021-06-05 21:55:02,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:02,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:02,097 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:02,319 INFO L93 Difference]: Finished difference Result 223 states and 485 transitions. [2021-06-05 21:55:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:02,320 INFO L225 Difference]: With dead ends: 223 [2021-06-05 21:55:02,320 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 21:55:02,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 21:55:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2021-06-05 21:55:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-06-05 21:55:02,321 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-06-05 21:55:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:02,322 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-06-05 21:55:02,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-06-05 21:55:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:02,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:02,322 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:02,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:02,522 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1341931903, now seen corresponding path program 413 times [2021-06-05 21:55:02,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:02,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954517729] [2021-06-05 21:55:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:02,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954517729] [2021-06-05 21:55:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954517729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398985773] [2021-06-05 21:55:02,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:02,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:02,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:02,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398985773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:02,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:02,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305775680] [2021-06-05 21:55:02,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:02,852 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:03,077 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-06-05 21:55:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:03,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:03,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:03,078 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:55:03,078 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:55:03,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:55:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2021-06-05 21:55:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-06-05 21:55:03,080 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-06-05 21:55:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:03,080 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-06-05 21:55:03,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-06-05 21:55:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:03,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:03,080 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:03,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-06-05 21:55:03,285 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:03,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2138667655, now seen corresponding path program 414 times [2021-06-05 21:55:03,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:03,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583401846] [2021-06-05 21:55:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:03,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:03,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583401846] [2021-06-05 21:55:03,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583401846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:03,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91679012] [2021-06-05 21:55:03,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:03,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:55:03,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:03,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91679012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:03,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:03,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:03,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382746960] [2021-06-05 21:55:03,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:03,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:03,614 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:04,016 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-06-05 21:55:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:04,017 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:55:04,017 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:55:04,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:55:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 200. [2021-06-05 21:55:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-06-05 21:55:04,019 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-06-05 21:55:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:04,019 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-06-05 21:55:04,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-06-05 21:55:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:04,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:04,019 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:04,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 21:55:04,219 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:04,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1868749406, now seen corresponding path program 415 times [2021-06-05 21:55:04,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:04,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020350622] [2021-06-05 21:55:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:04,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:04,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020350622] [2021-06-05 21:55:04,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020350622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:04,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930327040] [2021-06-05 21:55:04,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:04,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:04,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930327040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:04,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:04,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:04,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293411348] [2021-06-05 21:55:04,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:04,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:04,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:04,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:04,583 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:04,865 INFO L93 Difference]: Finished difference Result 221 states and 480 transitions. [2021-06-05 21:55:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:04,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:04,866 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:55:04,866 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 21:55:04,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 21:55:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-06-05 21:55:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-06-05 21:55:04,868 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-06-05 21:55:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:04,868 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-06-05 21:55:04,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-06-05 21:55:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:04,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:04,868 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:05,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:05,069 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:05,069 INFO L82 PathProgramCache]: Analyzing trace with hash -522557282, now seen corresponding path program 416 times [2021-06-05 21:55:05,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:05,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365140000] [2021-06-05 21:55:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:05,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:05,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365140000] [2021-06-05 21:55:05,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365140000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:05,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77467607] [2021-06-05 21:55:05,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:05,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:05,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:05,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77467607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:05,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:05,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:05,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589239846] [2021-06-05 21:55:05,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:05,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:05,402 INFO L87 Difference]: Start difference. First operand 198 states and 432 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:05,708 INFO L93 Difference]: Finished difference Result 255 states and 541 transitions. [2021-06-05 21:55:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:05,708 INFO L225 Difference]: With dead ends: 255 [2021-06-05 21:55:05,708 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:55:05,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:55:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-05 21:55:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.205) internal successors, (441), 200 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 441 transitions. [2021-06-05 21:55:05,710 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 441 transitions. Word has length 19 [2021-06-05 21:55:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:05,710 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 441 transitions. [2021-06-05 21:55:05,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 441 transitions. [2021-06-05 21:55:05,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:05,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:05,711 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:05,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:05,911 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1060412860, now seen corresponding path program 417 times [2021-06-05 21:55:05,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:05,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542536398] [2021-06-05 21:55:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:06,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542536398] [2021-06-05 21:55:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542536398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970541202] [2021-06-05 21:55:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:06,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:06,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:55:06,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:06,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970541202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:06,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:06,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:06,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772265102] [2021-06-05 21:55:06,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:06,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:06,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:06,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:06,252 INFO L87 Difference]: Start difference. First operand 201 states and 441 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:06,481 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2021-06-05 21:55:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:06,481 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:55:06,481 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:55:06,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:55:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-06-05 21:55:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-06-05 21:55:06,483 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-06-05 21:55:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:06,483 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-06-05 21:55:06,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-06-05 21:55:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:06,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:06,484 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:06,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:06,684 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:06,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1685578215, now seen corresponding path program 418 times [2021-06-05 21:55:06,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:06,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88886320] [2021-06-05 21:55:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:06,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:06,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88886320] [2021-06-05 21:55:06,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88886320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:06,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971395605] [2021-06-05 21:55:06,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:06,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:06,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:07,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971395605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:07,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:07,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758212335] [2021-06-05 21:55:07,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:07,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:07,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:07,014 INFO L87 Difference]: Start difference. First operand 196 states and 428 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:07,235 INFO L93 Difference]: Finished difference Result 221 states and 478 transitions. [2021-06-05 21:55:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:07,235 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:55:07,236 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 21:55:07,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 21:55:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2021-06-05 21:55:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.193877551020408) internal successors, (430), 196 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 430 transitions. [2021-06-05 21:55:07,237 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 430 transitions. Word has length 19 [2021-06-05 21:55:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:07,237 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 430 transitions. [2021-06-05 21:55:07,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 430 transitions. [2021-06-05 21:55:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:07,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:07,238 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:07,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3114 [2021-06-05 21:55:07,438 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash -888842463, now seen corresponding path program 419 times [2021-06-05 21:55:07,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:07,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499160127] [2021-06-05 21:55:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:07,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:07,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499160127] [2021-06-05 21:55:07,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499160127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:07,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987039559] [2021-06-05 21:55:07,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:07,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:55:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:07,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:07,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987039559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:07,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:07,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:07,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683813802] [2021-06-05 21:55:07,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:07,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:07,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:07,763 INFO L87 Difference]: Start difference. First operand 197 states and 430 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:07,931 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-06-05 21:55:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:07,931 INFO L225 Difference]: With dead ends: 240 [2021-06-05 21:55:07,931 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:55:07,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:55:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2021-06-05 21:55:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-06-05 21:55:07,933 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-06-05 21:55:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:07,933 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-06-05 21:55:07,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-06-05 21:55:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:07,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:07,934 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:08,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:08,134 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:08,134 INFO L82 PathProgramCache]: Analyzing trace with hash 238553630, now seen corresponding path program 420 times [2021-06-05 21:55:08,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:08,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107711658] [2021-06-05 21:55:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:08,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:08,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107711658] [2021-06-05 21:55:08,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107711658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:08,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666850023] [2021-06-05 21:55:08,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:08,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:55:08,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:08,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:08,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666850023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:08,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:08,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:08,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933702459] [2021-06-05 21:55:08,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:08,487 INFO L87 Difference]: Start difference. First operand 198 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:08,647 INFO L93 Difference]: Finished difference Result 215 states and 464 transitions. [2021-06-05 21:55:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:08,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:08,648 INFO L225 Difference]: With dead ends: 215 [2021-06-05 21:55:08,648 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:55:08,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:55:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-06-05 21:55:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-06-05 21:55:08,650 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-06-05 21:55:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:08,650 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-06-05 21:55:08,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-06-05 21:55:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:08,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:08,650 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:08,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:08,850 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -382496197, now seen corresponding path program 421 times [2021-06-05 21:55:08,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:08,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787662788] [2021-06-05 21:55:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:08,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:08,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787662788] [2021-06-05 21:55:08,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787662788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:08,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704815814] [2021-06-05 21:55:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704815814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:09,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:09,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:09,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960832193] [2021-06-05 21:55:09,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:09,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:09,230 INFO L87 Difference]: Start difference. First operand 196 states and 428 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:09,507 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2021-06-05 21:55:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:09,508 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:55:09,508 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 21:55:09,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 21:55:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 198. [2021-06-05 21:55:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-06-05 21:55:09,510 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-06-05 21:55:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:09,510 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-06-05 21:55:09,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-06-05 21:55:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:09,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:09,510 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:09,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:09,717 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -94945962, now seen corresponding path program 422 times [2021-06-05 21:55:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:09,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311758928] [2021-06-05 21:55:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:09,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:09,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311758928] [2021-06-05 21:55:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311758928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66988606] [2021-06-05 21:55:09,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:09,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:09,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:09,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:10,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66988606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:10,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:10,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:10,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269913] [2021-06-05 21:55:10,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:10,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:10,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:10,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:10,042 INFO L87 Difference]: Start difference. First operand 198 states and 432 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:10,378 INFO L93 Difference]: Finished difference Result 252 states and 536 transitions. [2021-06-05 21:55:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:10,379 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:55:10,379 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 21:55:10,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 450.0ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 21:55:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2021-06-05 21:55:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.207070707070707) internal successors, (437), 198 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 437 transitions. [2021-06-05 21:55:10,381 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 437 transitions. Word has length 19 [2021-06-05 21:55:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:10,381 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 437 transitions. [2021-06-05 21:55:10,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 437 transitions. [2021-06-05 21:55:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:10,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:10,381 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:10,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-06-05 21:55:10,582 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:10,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:10,582 INFO L82 PathProgramCache]: Analyzing trace with hash 207044318, now seen corresponding path program 423 times [2021-06-05 21:55:10,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:10,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412836125] [2021-06-05 21:55:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:10,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:10,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412836125] [2021-06-05 21:55:10,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412836125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:10,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923250163] [2021-06-05 21:55:10,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:10,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:10,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:10,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923250163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:10,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:10,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989132092] [2021-06-05 21:55:10,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:10,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:10,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:10,910 INFO L87 Difference]: Start difference. First operand 199 states and 437 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:11,116 INFO L93 Difference]: Finished difference Result 227 states and 490 transitions. [2021-06-05 21:55:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:55:11,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:11,116 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:55:11,116 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:55:11,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:55:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 195. [2021-06-05 21:55:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.195876288659794) internal successors, (426), 194 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 426 transitions. [2021-06-05 21:55:11,118 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 426 transitions. Word has length 19 [2021-06-05 21:55:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:11,118 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 426 transitions. [2021-06-05 21:55:11,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 426 transitions. [2021-06-05 21:55:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:11,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:11,118 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:11,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:11,319 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:11,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1865631135, now seen corresponding path program 424 times [2021-06-05 21:55:11,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:11,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894556648] [2021-06-05 21:55:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:11,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:11,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894556648] [2021-06-05 21:55:11,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894556648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:11,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109211559] [2021-06-05 21:55:11,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:11,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:11,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:11,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:11,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109211559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:11,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:11,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:11,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183918526] [2021-06-05 21:55:11,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:11,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:11,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:11,687 INFO L87 Difference]: Start difference. First operand 195 states and 426 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:11,932 INFO L93 Difference]: Finished difference Result 214 states and 462 transitions. [2021-06-05 21:55:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:11,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:11,932 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:55:11,932 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 21:55:11,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 21:55:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2021-06-05 21:55:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1794871794871793) internal successors, (425), 195 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 425 transitions. [2021-06-05 21:55:11,934 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 425 transitions. Word has length 19 [2021-06-05 21:55:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:11,934 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 425 transitions. [2021-06-05 21:55:11,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 425 transitions. [2021-06-05 21:55:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:11,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:11,934 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:12,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-06-05 21:55:12,135 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1578080900, now seen corresponding path program 425 times [2021-06-05 21:55:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:12,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408971389] [2021-06-05 21:55:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:12,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:12,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408971389] [2021-06-05 21:55:12,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408971389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:12,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507023466] [2021-06-05 21:55:12,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:12,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:12,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:12,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507023466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:12,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:12,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90168552] [2021-06-05 21:55:12,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:12,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:12,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:12,447 INFO L87 Difference]: Start difference. First operand 196 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:12,893 INFO L93 Difference]: Finished difference Result 263 states and 555 transitions. [2021-06-05 21:55:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:12,893 INFO L225 Difference]: With dead ends: 263 [2021-06-05 21:55:12,893 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 21:55:12,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 21:55:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 198. [2021-06-05 21:55:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-06-05 21:55:12,895 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-06-05 21:55:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:12,895 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-06-05 21:55:12,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-06-05 21:55:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:12,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:12,896 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:13,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:13,096 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1276090620, now seen corresponding path program 426 times [2021-06-05 21:55:13,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:13,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993381814] [2021-06-05 21:55:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:13,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993381814] [2021-06-05 21:55:13,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993381814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577318052] [2021-06-05 21:55:13,189 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 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:13,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:13,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:13,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:13,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:13,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577318052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:13,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:13,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:13,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511229291] [2021-06-05 21:55:13,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:13,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:13,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:13,393 INFO L87 Difference]: Start difference. First operand 198 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:13,762 INFO L93 Difference]: Finished difference Result 236 states and 507 transitions. [2021-06-05 21:55:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:13,763 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:55:13,763 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:55:13,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:55:13,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 197. [2021-06-05 21:55:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1989795918367347) internal successors, (431), 196 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 431 transitions. [2021-06-05 21:55:13,765 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 431 transitions. Word has length 19 [2021-06-05 21:55:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:13,765 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 431 transitions. [2021-06-05 21:55:13,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 431 transitions. [2021-06-05 21:55:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:13,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:13,765 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:13,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:13,965 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:13,966 INFO L82 PathProgramCache]: Analyzing trace with hash -769744354, now seen corresponding path program 427 times [2021-06-05 21:55:13,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:13,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811521796] [2021-06-05 21:55:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:14,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811521796] [2021-06-05 21:55:14,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811521796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410292823] [2021-06-05 21:55:14,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:14,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:14,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410292823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:14,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:14,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:14,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058262208] [2021-06-05 21:55:14,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:14,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:14,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:14,261 INFO L87 Difference]: Start difference. First operand 197 states and 431 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:14,413 INFO L93 Difference]: Finished difference Result 230 states and 493 transitions. [2021-06-05 21:55:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:14,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:14,414 INFO L225 Difference]: With dead ends: 230 [2021-06-05 21:55:14,414 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 21:55:14,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 21:55:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-06-05 21:55:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-06-05 21:55:14,416 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-06-05 21:55:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:14,416 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-06-05 21:55:14,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-06-05 21:55:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:14,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:14,416 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:14,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:14,617 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1049111361, now seen corresponding path program 428 times [2021-06-05 21:55:14,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:14,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569295778] [2021-06-05 21:55:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:14,741 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 21:55:14,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:14,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569295778] [2021-06-05 21:55:14,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569295778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:14,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432859118] [2021-06-05 21:55:14,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:14,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:14,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:14,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432859118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:14,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:14,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:14,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470267673] [2021-06-05 21:55:14,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:14,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:14,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:14,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:14,936 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:15,106 INFO L93 Difference]: Finished difference Result 217 states and 467 transitions. [2021-06-05 21:55:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:15,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:15,106 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:55:15,106 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:55:15,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:55:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-06-05 21:55:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.183246073298429) internal successors, (417), 191 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 417 transitions. [2021-06-05 21:55:15,108 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 417 transitions. Word has length 19 [2021-06-05 21:55:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:15,108 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 417 transitions. [2021-06-05 21:55:15,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 417 transitions. [2021-06-05 21:55:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:15,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:15,108 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:15,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:15,309 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash -252375609, now seen corresponding path program 429 times [2021-06-05 21:55:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:15,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967889473] [2021-06-05 21:55:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:15,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:15,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967889473] [2021-06-05 21:55:15,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967889473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:15,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116088973] [2021-06-05 21:55:15,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:15,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:55:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:15,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116088973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:15,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:15,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:15,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806766811] [2021-06-05 21:55:15,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:15,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:15,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:15,650 INFO L87 Difference]: Start difference. First operand 192 states and 417 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:15,874 INFO L93 Difference]: Finished difference Result 236 states and 502 transitions. [2021-06-05 21:55:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:15,874 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:55:15,874 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 21:55:15,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 21:55:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 193. [2021-06-05 21:55:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1875) internal successors, (420), 192 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 420 transitions. [2021-06-05 21:55:15,876 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 420 transitions. Word has length 19 [2021-06-05 21:55:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:15,876 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 420 transitions. [2021-06-05 21:55:15,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 420 transitions. [2021-06-05 21:55:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:15,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:15,877 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:16,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 21:55:16,077 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 875020484, now seen corresponding path program 430 times [2021-06-05 21:55:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:16,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10834739] [2021-06-05 21:55:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:16,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:16,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10834739] [2021-06-05 21:55:16,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10834739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:16,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335745080] [2021-06-05 21:55:16,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:16,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:16,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335745080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:16,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:16,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:16,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216192803] [2021-06-05 21:55:16,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:16,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:16,433 INFO L87 Difference]: Start difference. First operand 193 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:16,607 INFO L93 Difference]: Finished difference Result 211 states and 453 transitions. [2021-06-05 21:55:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:16,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:16,607 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:55:16,608 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 21:55:16,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 21:55:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-06-05 21:55:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-06-05 21:55:16,609 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-06-05 21:55:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:16,609 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-06-05 21:55:16,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-06-05 21:55:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:16,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:16,610 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:16,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3192 [2021-06-05 21:55:16,810 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash 253970657, now seen corresponding path program 431 times [2021-06-05 21:55:16,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:16,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372944947] [2021-06-05 21:55:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:16,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:16,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372944947] [2021-06-05 21:55:16,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372944947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:16,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942263293] [2021-06-05 21:55:16,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:16,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:17,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942263293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:17,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:17,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:17,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544949475] [2021-06-05 21:55:17,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:17,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:17,186 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:17,372 INFO L93 Difference]: Finished difference Result 208 states and 449 transitions. [2021-06-05 21:55:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:17,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:17,373 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:55:17,373 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:55:17,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:55:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 193. [2021-06-05 21:55:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-06-05 21:55:17,374 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-06-05 21:55:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:17,374 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-06-05 21:55:17,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-06-05 21:55:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:17,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:17,375 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:17,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:17,575 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:17,576 INFO L82 PathProgramCache]: Analyzing trace with hash 541520892, now seen corresponding path program 432 times [2021-06-05 21:55:17,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:17,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371555918] [2021-06-05 21:55:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:17,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:17,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371555918] [2021-06-05 21:55:17,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371555918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:17,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635639430] [2021-06-05 21:55:17,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:17,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:17,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:17,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:17,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:17,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635639430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:17,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:17,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:17,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568112993] [2021-06-05 21:55:17,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:17,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:17,931 INFO L87 Difference]: Start difference. First operand 193 states and 419 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:18,269 INFO L93 Difference]: Finished difference Result 243 states and 515 transitions. [2021-06-05 21:55:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:18,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:18,270 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:55:18,270 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 21:55:18,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 21:55:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-06-05 21:55:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1968911917098444) internal successors, (424), 193 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 424 transitions. [2021-06-05 21:55:18,272 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 424 transitions. Word has length 19 [2021-06-05 21:55:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:18,272 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 424 transitions. [2021-06-05 21:55:18,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 424 transitions. [2021-06-05 21:55:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:18,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:18,273 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:18,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-05 21:55:18,473 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash 843511172, now seen corresponding path program 433 times [2021-06-05 21:55:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:18,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893749183] [2021-06-05 21:55:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:18,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893749183] [2021-06-05 21:55:18,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893749183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931830971] [2021-06-05 21:55:18,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:18,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:18,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931830971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:18,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:18,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:18,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583838854] [2021-06-05 21:55:18,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:18,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:18,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:18,797 INFO L87 Difference]: Start difference. First operand 194 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:19,001 INFO L93 Difference]: Finished difference Result 220 states and 473 transitions. [2021-06-05 21:55:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:19,002 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:55:19,002 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:55:19,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:55:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2021-06-05 21:55:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-06-05 21:55:19,004 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-06-05 21:55:19,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:19,004 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-06-05 21:55:19,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-06-05 21:55:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:19,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:19,004 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:19,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:19,217 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash -101768188, now seen corresponding path program 434 times [2021-06-05 21:55:19,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:19,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632547755] [2021-06-05 21:55:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:19,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:19,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632547755] [2021-06-05 21:55:19,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632547755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:19,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043041541] [2021-06-05 21:55:19,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:19,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:19,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:19,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043041541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:19,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:19,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:19,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173778698] [2021-06-05 21:55:19,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:19,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:19,566 INFO L87 Difference]: Start difference. First operand 190 states and 413 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:20,170 INFO L93 Difference]: Finished difference Result 262 states and 552 transitions. [2021-06-05 21:55:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:20,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:20,171 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:55:20,171 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:55:20,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:55:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-06-05 21:55:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-06-05 21:55:20,173 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-06-05 21:55:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:20,173 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-06-05 21:55:20,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-06-05 21:55:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:20,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:20,173 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:20,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-06-05 21:55:20,373 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash -639623766, now seen corresponding path program 435 times [2021-06-05 21:55:20,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:20,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589557175] [2021-06-05 21:55:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:20,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:20,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589557175] [2021-06-05 21:55:20,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589557175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:20,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752716712] [2021-06-05 21:55:20,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:20,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:20,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:20,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752716712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:20,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:20,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180028605] [2021-06-05 21:55:20,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:20,674 INFO L87 Difference]: Start difference. First operand 193 states and 423 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:21,111 INFO L93 Difference]: Finished difference Result 231 states and 497 transitions. [2021-06-05 21:55:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:21,111 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:55:21,111 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 21:55:21,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 509.3ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 21:55:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2021-06-05 21:55:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-06-05 21:55:21,113 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-06-05 21:55:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:21,113 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-06-05 21:55:21,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-06-05 21:55:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:21,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:21,114 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:21,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:21,314 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:21,314 INFO L82 PathProgramCache]: Analyzing trace with hash -133277500, now seen corresponding path program 436 times [2021-06-05 21:55:21,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:21,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737290120] [2021-06-05 21:55:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:21,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:21,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737290120] [2021-06-05 21:55:21,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737290120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:21,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56864587] [2021-06-05 21:55:21,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:21,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:21,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:21,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56864587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:21,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:21,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:21,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950898901] [2021-06-05 21:55:21,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:21,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:21,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:21,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:21,610 INFO L87 Difference]: Start difference. First operand 193 states and 423 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:21,788 INFO L93 Difference]: Finished difference Result 226 states and 485 transitions. [2021-06-05 21:55:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:21,789 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:55:21,789 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:55:21,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:55:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 190. [2021-06-05 21:55:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-06-05 21:55:21,790 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-06-05 21:55:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:21,790 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-06-05 21:55:21,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-06-05 21:55:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:21,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:21,791 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:21,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-06-05 21:55:21,991 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash 38292897, now seen corresponding path program 437 times [2021-06-05 21:55:21,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:21,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331949580] [2021-06-05 21:55:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:22,083 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 21:55:22,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:22,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331949580] [2021-06-05 21:55:22,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331949580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:22,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287599681] [2021-06-05 21:55:22,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:22,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:22,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:22,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287599681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:22,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:22,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338474419] [2021-06-05 21:55:22,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:22,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:22,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:22,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:22,388 INFO L87 Difference]: Start difference. First operand 190 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:22,850 INFO L93 Difference]: Finished difference Result 216 states and 461 transitions. [2021-06-05 21:55:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:22,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:22,850 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:55:22,850 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:55:22,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:55:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 193. [2021-06-05 21:55:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-06-05 21:55:22,852 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-06-05 21:55:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:22,852 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-06-05 21:55:22,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-06-05 21:55:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:22,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:22,853 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:23,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:23,053 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 325843132, now seen corresponding path program 438 times [2021-06-05 21:55:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742095420] [2021-06-05 21:55:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:23,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:23,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742095420] [2021-06-05 21:55:23,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742095420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:23,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21008001] [2021-06-05 21:55:23,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:23,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:23,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:23,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21008001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:23,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:23,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:23,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627693582] [2021-06-05 21:55:23,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:23,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:23,372 INFO L87 Difference]: Start difference. First operand 193 states and 419 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:24,028 INFO L93 Difference]: Finished difference Result 254 states and 537 transitions. [2021-06-05 21:55:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:24,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:24,029 INFO L225 Difference]: With dead ends: 254 [2021-06-05 21:55:24,029 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 21:55:24,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:55:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 21:55:24,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2021-06-05 21:55:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2051282051282053) internal successors, (430), 195 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 430 transitions. [2021-06-05 21:55:24,031 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 430 transitions. Word has length 19 [2021-06-05 21:55:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:24,031 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 430 transitions. [2021-06-05 21:55:24,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 430 transitions. [2021-06-05 21:55:24,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:24,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:24,031 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:24,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:24,231 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash 627833412, now seen corresponding path program 439 times [2021-06-05 21:55:24,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:24,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576228359] [2021-06-05 21:55:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:24,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:24,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576228359] [2021-06-05 21:55:24,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576228359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:24,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587467727] [2021-06-05 21:55:24,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:24,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587467727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:24,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:24,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:24,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656617781] [2021-06-05 21:55:24,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:24,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:24,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:24,553 INFO L87 Difference]: Start difference. First operand 196 states and 430 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:25,157 INFO L93 Difference]: Finished difference Result 241 states and 517 transitions. [2021-06-05 21:55:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:25,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:25,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:25,157 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:55:25,157 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:55:25,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:55:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:55:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 195. [2021-06-05 21:55:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.2061855670103094) internal successors, (428), 194 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 428 transitions. [2021-06-05 21:55:25,159 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 428 transitions. Word has length 19 [2021-06-05 21:55:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:25,159 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 428 transitions. [2021-06-05 21:55:25,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 428 transitions. [2021-06-05 21:55:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:25,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:25,160 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:25,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3251,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:25,360 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:25,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1134179678, now seen corresponding path program 440 times [2021-06-05 21:55:25,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:25,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605693466] [2021-06-05 21:55:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:25,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:25,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605693466] [2021-06-05 21:55:25,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605693466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:25,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100410226] [2021-06-05 21:55:25,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:25,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:25,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:25,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:25,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100410226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:25,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:25,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:25,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950871439] [2021-06-05 21:55:25,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:25,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:25,677 INFO L87 Difference]: Start difference. First operand 195 states and 428 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:26,188 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-06-05 21:55:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:26,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:26,189 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:55:26,189 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:55:26,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 591.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:55:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:55:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2021-06-05 21:55:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2072538860103625) internal successors, (426), 193 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 426 transitions. [2021-06-05 21:55:26,190 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 426 transitions. Word has length 19 [2021-06-05 21:55:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:26,190 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 426 transitions. [2021-06-05 21:55:26,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 426 transitions. [2021-06-05 21:55:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:26,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:26,191 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:26,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:26,391 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash -348955260, now seen corresponding path program 441 times [2021-06-05 21:55:26,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:26,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349797230] [2021-06-05 21:55:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:26,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349797230] [2021-06-05 21:55:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349797230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:26,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273507945] [2021-06-05 21:55:26,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:26,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:26,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:26,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:26,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:26,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273507945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:26,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:26,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:26,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325908501] [2021-06-05 21:55:26,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:26,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:26,694 INFO L87 Difference]: Start difference. First operand 194 states and 426 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:26,999 INFO L93 Difference]: Finished difference Result 218 states and 469 transitions. [2021-06-05 21:55:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:27,000 INFO L225 Difference]: With dead ends: 218 [2021-06-05 21:55:27,000 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 21:55:27,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 21:55:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2021-06-05 21:55:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-05 21:55:27,002 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-05 21:55:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:27,002 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-05 21:55:27,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-05 21:55:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:27,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:27,002 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:27,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:27,218 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:27,218 INFO L82 PathProgramCache]: Analyzing trace with hash -657700315, now seen corresponding path program 442 times [2021-06-05 21:55:27,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:27,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721789896] [2021-06-05 21:55:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:27,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721789896] [2021-06-05 21:55:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721789896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927556371] [2021-06-05 21:55:27,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:27,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:27,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:27,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:27,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:27,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927556371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:27,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:27,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:27,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363775389] [2021-06-05 21:55:27,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:27,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:27,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:27,552 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:27,677 INFO L93 Difference]: Finished difference Result 198 states and 429 transitions. [2021-06-05 21:55:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:27,678 INFO L225 Difference]: With dead ends: 198 [2021-06-05 21:55:27,678 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 21:55:27,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 21:55:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-06-05 21:55:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-05 21:55:27,680 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-05 21:55:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:27,680 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-05 21:55:27,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-05 21:55:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:27,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:27,680 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:27,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:27,880 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:27,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:27,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1728695779, now seen corresponding path program 443 times [2021-06-05 21:55:27,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:27,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649046881] [2021-06-05 21:55:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:27,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649046881] [2021-06-05 21:55:27,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649046881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477297882] [2021-06-05 21:55:27,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:28,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:28,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:28,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:28,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477297882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:28,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:28,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:28,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622680097] [2021-06-05 21:55:28,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:28,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:28,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:28,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:28,209 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:28,564 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-06-05 21:55:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:28,565 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:28,565 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:55:28,565 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:55:28,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:55:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-06-05 21:55:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-05 21:55:28,567 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-05 21:55:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:28,567 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-05 21:55:28,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-05 21:55:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:28,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:28,567 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:28,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-06-05 21:55:28,767 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash -931960027, now seen corresponding path program 444 times [2021-06-05 21:55:28,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:28,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146513068] [2021-06-05 21:55:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:28,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:28,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146513068] [2021-06-05 21:55:28,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146513068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:28,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523041180] [2021-06-05 21:55:28,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:28,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:55:28,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523041180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:29,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:29,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:29,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808313766] [2021-06-05 21:55:29,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:29,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:29,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:29,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:29,084 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:29,466 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-06-05 21:55:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:29,466 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:55:29,466 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:55:29,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:55:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-06-05 21:55:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-05 21:55:29,468 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-05 21:55:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:29,468 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-05 21:55:29,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-05 21:55:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:29,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:29,468 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:29,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-05 21:55:29,673 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash -644409792, now seen corresponding path program 445 times [2021-06-05 21:55:29,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:29,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114278663] [2021-06-05 21:55:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:29,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:29,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114278663] [2021-06-05 21:55:29,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114278663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:29,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492803667] [2021-06-05 21:55:29,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:29,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:29,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:30,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492803667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:30,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:30,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:30,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075295288] [2021-06-05 21:55:30,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:30,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:30,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:30,041 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:30,196 INFO L93 Difference]: Finished difference Result 199 states and 430 transitions. [2021-06-05 21:55:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:55:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:30,196 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:55:30,196 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:55:30,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:55:30,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 184. [2021-06-05 21:55:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-06-05 21:55:30,198 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-06-05 21:55:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:30,198 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-06-05 21:55:30,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-06-05 21:55:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:30,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:30,199 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:30,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3283,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:30,399 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1083136579, now seen corresponding path program 446 times [2021-06-05 21:55:30,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:30,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658384687] [2021-06-05 21:55:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:30,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:30,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658384687] [2021-06-05 21:55:30,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658384687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:30,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968824863] [2021-06-05 21:55:30,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:30,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:30,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:30,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968824863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:30,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:30,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:30,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270427535] [2021-06-05 21:55:30,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:30,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:30,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:30,763 INFO L87 Difference]: Start difference. First operand 184 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:31,055 INFO L93 Difference]: Finished difference Result 207 states and 443 transitions. [2021-06-05 21:55:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:31,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:31,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:31,055 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:55:31,055 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:55:31,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:55:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 184. [2021-06-05 21:55:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-06-05 21:55:31,057 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-06-05 21:55:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:31,057 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-06-05 21:55:31,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-06-05 21:55:31,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:31,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:31,058 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:31,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3291 [2021-06-05 21:55:31,258 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:31,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1879872331, now seen corresponding path program 447 times [2021-06-05 21:55:31,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:31,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685221368] [2021-06-05 21:55:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:31,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:31,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685221368] [2021-06-05 21:55:31,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685221368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:31,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239290298] [2021-06-05 21:55:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:31,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:31,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:31,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:31,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239290298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:31,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:31,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:31,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193193661] [2021-06-05 21:55:31,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:31,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:31,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:31,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:31,650 INFO L87 Difference]: Start difference. First operand 184 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:32,115 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2021-06-05 21:55:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:55:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:32,116 INFO L225 Difference]: With dead ends: 223 [2021-06-05 21:55:32,116 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:55:32,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:55:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2021-06-05 21:55:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-06-05 21:55:32,118 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-06-05 21:55:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:32,118 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-06-05 21:55:32,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-06-05 21:55:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:32,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:32,118 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-06-05 21:55:32,318 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1287698872, now seen corresponding path program 448 times [2021-06-05 21:55:32,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:32,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321072427] [2021-06-05 21:55:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:32,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:32,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321072427] [2021-06-05 21:55:32,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321072427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:32,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661058962] [2021-06-05 21:55:32,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:32,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:32,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:32,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661058962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:32,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:32,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:32,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637339795] [2021-06-05 21:55:32,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:32,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:32,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:32,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:32,679 INFO L87 Difference]: Start difference. First operand 184 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:32,971 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-06-05 21:55:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:32,971 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:55:32,971 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:55:32,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 417.0ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:55:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-06-05 21:55:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.160220994475138) internal successors, (391), 181 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 391 transitions. [2021-06-05 21:55:32,973 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 391 transitions. Word has length 19 [2021-06-05 21:55:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:32,973 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 391 transitions. [2021-06-05 21:55:32,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 391 transitions. [2021-06-05 21:55:32,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:32,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:32,973 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:33,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:33,174 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash -781352606, now seen corresponding path program 449 times [2021-06-05 21:55:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:33,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207414279] [2021-06-05 21:55:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:33,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:33,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207414279] [2021-06-05 21:55:33,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207414279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:33,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746834852] [2021-06-05 21:55:33,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:33,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:55:33,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:33,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:33,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746834852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:33,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:33,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:33,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913659808] [2021-06-05 21:55:33,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:33,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:33,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:33,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:33,506 INFO L87 Difference]: Start difference. First operand 182 states and 391 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:33,907 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-06-05 21:55:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:55:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:33,907 INFO L225 Difference]: With dead ends: 266 [2021-06-05 21:55:33,907 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 21:55:33,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 21:55:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2021-06-05 21:55:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1739130434782608) internal successors, (400), 184 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 400 transitions. [2021-06-05 21:55:33,909 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 400 transitions. Word has length 19 [2021-06-05 21:55:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:33,909 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 400 transitions. [2021-06-05 21:55:33,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 400 transitions. [2021-06-05 21:55:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:33,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:33,909 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:34,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:34,110 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1319208184, now seen corresponding path program 450 times [2021-06-05 21:55:34,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:34,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065198898] [2021-06-05 21:55:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:34,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:34,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065198898] [2021-06-05 21:55:34,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065198898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:34,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377969530] [2021-06-05 21:55:34,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:34,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:55:34,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:34,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:34,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377969530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:34,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:34,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:34,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275036856] [2021-06-05 21:55:34,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:34,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:34,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:34,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:34,437 INFO L87 Difference]: Start difference. First operand 185 states and 400 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:34,623 INFO L93 Difference]: Finished difference Result 211 states and 449 transitions. [2021-06-05 21:55:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:34,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:34,623 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:55:34,623 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:55:34,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:55:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2021-06-05 21:55:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-06-05 21:55:34,625 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-06-05 21:55:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:34,625 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-06-05 21:55:34,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-06-05 21:55:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:34,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:34,625 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:34,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-06-05 21:55:34,844 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1944373539, now seen corresponding path program 451 times [2021-06-05 21:55:34,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:34,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810349072] [2021-06-05 21:55:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:34,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:34,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810349072] [2021-06-05 21:55:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810349072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:34,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909410556] [2021-06-05 21:55:34,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:35,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909410556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:35,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:35,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:35,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592914646] [2021-06-05 21:55:35,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:35,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:35,174 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:35,551 INFO L93 Difference]: Finished difference Result 206 states and 438 transitions. [2021-06-05 21:55:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:35,552 INFO L225 Difference]: With dead ends: 206 [2021-06-05 21:55:35,552 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 21:55:35,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 21:55:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 180. [2021-06-05 21:55:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-06-05 21:55:35,553 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-06-05 21:55:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:35,554 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-06-05 21:55:35,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-06-05 21:55:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:35,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:35,554 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:35,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3324 [2021-06-05 21:55:35,754 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash 222508706, now seen corresponding path program 452 times [2021-06-05 21:55:35,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:35,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665764706] [2021-06-05 21:55:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:35,867 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 21:55:35,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:35,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665764706] [2021-06-05 21:55:35,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665764706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:35,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869034865] [2021-06-05 21:55:35,868 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 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:35,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:35,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:36,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869034865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:36,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:36,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:36,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242615783] [2021-06-05 21:55:36,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:36,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:36,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:36,115 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:36,365 INFO L93 Difference]: Finished difference Result 221 states and 453 transitions. [2021-06-05 21:55:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:36,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:36,365 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:55:36,365 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:55:36,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:55:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2021-06-05 21:55:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-06-05 21:55:36,367 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-06-05 21:55:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:36,367 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-06-05 21:55:36,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-06-05 21:55:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:36,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:36,368 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:36,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:36,568 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash -20241694, now seen corresponding path program 453 times [2021-06-05 21:55:36,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:36,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130096780] [2021-06-05 21:55:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:36,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130096780] [2021-06-05 21:55:36,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130096780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259686729] [2021-06-05 21:55:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:36,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:36,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259686729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:36,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:36,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:36,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889601011] [2021-06-05 21:55:36,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:36,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:36,941 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:37,191 INFO L93 Difference]: Finished difference Result 195 states and 416 transitions. [2021-06-05 21:55:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:37,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:37,192 INFO L225 Difference]: With dead ends: 195 [2021-06-05 21:55:37,192 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 21:55:37,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 21:55:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-06-05 21:55:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.15819209039548) internal successors, (382), 177 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 382 transitions. [2021-06-05 21:55:37,193 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 382 transitions. Word has length 19 [2021-06-05 21:55:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:37,193 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 382 transitions. [2021-06-05 21:55:37,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 382 transitions. [2021-06-05 21:55:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:37,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:37,194 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:37,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3336 [2021-06-05 21:55:37,394 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash -641291521, now seen corresponding path program 454 times [2021-06-05 21:55:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:37,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551429206] [2021-06-05 21:55:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:37,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551429206] [2021-06-05 21:55:37,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551429206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930900394] [2021-06-05 21:55:37,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:37,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:37,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:37,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930900394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:37,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:37,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:37,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510484581] [2021-06-05 21:55:37,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:37,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:37,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:37,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:37,786 INFO L87 Difference]: Start difference. First operand 178 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:38,729 INFO L93 Difference]: Finished difference Result 290 states and 582 transitions. [2021-06-05 21:55:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:55:38,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:38,729 INFO L225 Difference]: With dead ends: 290 [2021-06-05 21:55:38,729 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 21:55:38,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 963.3ms TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:55:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 21:55:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 183. [2021-06-05 21:55:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-06-05 21:55:38,731 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-06-05 21:55:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:38,731 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-06-05 21:55:38,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-06-05 21:55:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:38,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:38,732 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:38,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:38,932 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash -353741286, now seen corresponding path program 455 times [2021-06-05 21:55:38,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:38,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826844355] [2021-06-05 21:55:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:39,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826844355] [2021-06-05 21:55:39,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826844355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393266417] [2021-06-05 21:55:39,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:39,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:39,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:39,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:39,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393266417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:39,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:39,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:39,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726449950] [2021-06-05 21:55:39,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:39,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:39,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:39,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:39,265 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:39,764 INFO L93 Difference]: Finished difference Result 266 states and 543 transitions. [2021-06-05 21:55:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:55:39,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:39,765 INFO L225 Difference]: With dead ends: 266 [2021-06-05 21:55:39,765 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 21:55:39,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 546.2ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 21:55:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2021-06-05 21:55:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.185792349726776) internal successors, (400), 183 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 400 transitions. [2021-06-05 21:55:39,767 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 400 transitions. Word has length 19 [2021-06-05 21:55:39,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:39,767 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 400 transitions. [2021-06-05 21:55:39,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 400 transitions. [2021-06-05 21:55:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:39,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:39,768 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:39,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-06-05 21:55:39,968 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:39,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1981190685, now seen corresponding path program 456 times [2021-06-05 21:55:39,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:39,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023388320] [2021-06-05 21:55:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:40,083 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 21:55:40,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:40,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023388320] [2021-06-05 21:55:40,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023388320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:40,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962034857] [2021-06-05 21:55:40,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:40,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:55:40,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:40,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:40,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962034857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:40,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:40,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:40,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940704550] [2021-06-05 21:55:40,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:40,351 INFO L87 Difference]: Start difference. First operand 184 states and 400 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:40,654 INFO L93 Difference]: Finished difference Result 203 states and 433 transitions. [2021-06-05 21:55:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:40,654 INFO L225 Difference]: With dead ends: 203 [2021-06-05 21:55:40,654 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:55:40,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:55:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-06-05 21:55:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.180327868852459) internal successors, (399), 183 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 399 transitions. [2021-06-05 21:55:40,656 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 399 transitions. Word has length 19 [2021-06-05 21:55:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:40,656 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 399 transitions. [2021-06-05 21:55:40,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 399 transitions. [2021-06-05 21:55:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:40,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:40,656 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:40,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3359 [2021-06-05 21:55:40,856 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash -51751006, now seen corresponding path program 457 times [2021-06-05 21:55:40,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:40,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27568801] [2021-06-05 21:55:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:40,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:40,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27568801] [2021-06-05 21:55:40,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27568801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:40,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925211287] [2021-06-05 21:55:40,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:41,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:41,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925211287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:41,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:41,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:41,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615230753] [2021-06-05 21:55:41,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:41,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:41,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:41,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:41,175 INFO L87 Difference]: Start difference. First operand 184 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:41,398 INFO L93 Difference]: Finished difference Result 210 states and 448 transitions. [2021-06-05 21:55:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:41,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:41,399 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:55:41,399 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 21:55:41,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 21:55:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 181. [2021-06-05 21:55:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-06-05 21:55:41,401 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-06-05 21:55:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:41,401 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-06-05 21:55:41,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-06-05 21:55:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:41,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:41,401 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:41,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:41,601 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2124426459, now seen corresponding path program 458 times [2021-06-05 21:55:41,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:41,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836090880] [2021-06-05 21:55:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:41,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:41,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836090880] [2021-06-05 21:55:41,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836090880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:41,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640490701] [2021-06-05 21:55:41,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:41,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:41,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:41,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640490701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:41,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:41,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:41,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041974838] [2021-06-05 21:55:41,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:41,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:41,976 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:42,177 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2021-06-05 21:55:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:42,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:42,177 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:55:42,177 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:55:42,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:55:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 184. [2021-06-05 21:55:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-06-05 21:55:42,179 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-06-05 21:55:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:42,179 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-06-05 21:55:42,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-06-05 21:55:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:42,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:42,179 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:42,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3372,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:42,380 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:42,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1836876224, now seen corresponding path program 459 times [2021-06-05 21:55:42,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:42,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135969783] [2021-06-05 21:55:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:42,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135969783] [2021-06-05 21:55:42,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135969783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008870714] [2021-06-05 21:55:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:42,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:42,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:55:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:42,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008870714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:42,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:42,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:42,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15094979] [2021-06-05 21:55:42,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:42,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:42,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:42,694 INFO L87 Difference]: Start difference. First operand 184 states and 396 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:43,292 INFO L93 Difference]: Finished difference Result 276 states and 564 transitions. [2021-06-05 21:55:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:55:43,292 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:43,293 INFO L225 Difference]: With dead ends: 276 [2021-06-05 21:55:43,293 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 21:55:43,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:55:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 21:55:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 186. [2021-06-05 21:55:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1837837837837837) internal successors, (404), 185 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 404 transitions. [2021-06-05 21:55:43,294 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 404 transitions. Word has length 19 [2021-06-05 21:55:43,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:43,295 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 404 transitions. [2021-06-05 21:55:43,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 404 transitions. [2021-06-05 21:55:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:43,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:43,295 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:43,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:43,495 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1534885944, now seen corresponding path program 460 times [2021-06-05 21:55:43,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:43,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716397477] [2021-06-05 21:55:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:43,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:43,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716397477] [2021-06-05 21:55:43,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716397477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:43,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48890011] [2021-06-05 21:55:43,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:43,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:43,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:43,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48890011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:43,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:43,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:43,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311679768] [2021-06-05 21:55:43,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:43,803 INFO L87 Difference]: Start difference. First operand 186 states and 404 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:44,168 INFO L93 Difference]: Finished difference Result 228 states and 486 transitions. [2021-06-05 21:55:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:44,168 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:55:44,169 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:55:44,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:55:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2021-06-05 21:55:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1847826086956523) internal successors, (402), 184 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 402 transitions. [2021-06-05 21:55:44,170 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 402 transitions. Word has length 19 [2021-06-05 21:55:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:44,170 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 402 transitions. [2021-06-05 21:55:44,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 402 transitions. [2021-06-05 21:55:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:44,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:44,171 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:44,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:44,371 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1028539678, now seen corresponding path program 461 times [2021-06-05 21:55:44,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:44,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064385076] [2021-06-05 21:55:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:44,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:44,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064385076] [2021-06-05 21:55:44,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064385076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:44,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735016008] [2021-06-05 21:55:44,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:44,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:55:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:44,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735016008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:44,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:44,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:44,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346509189] [2021-06-05 21:55:44,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:44,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:44,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:44,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:44,700 INFO L87 Difference]: Start difference. First operand 185 states and 402 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:44,852 INFO L93 Difference]: Finished difference Result 222 states and 472 transitions. [2021-06-05 21:55:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:44,853 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:55:44,853 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 21:55:44,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 21:55:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 181. [2021-06-05 21:55:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-06-05 21:55:44,855 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-06-05 21:55:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:44,855 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-06-05 21:55:44,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-06-05 21:55:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:44,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:44,855 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:45,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-05 21:55:45,055 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:45,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1307906685, now seen corresponding path program 462 times [2021-06-05 21:55:45,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:45,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352575154] [2021-06-05 21:55:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:45,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352575154] [2021-06-05 21:55:45,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352575154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:45,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518771314] [2021-06-05 21:55:45,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:45,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:55:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:45,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518771314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:45,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:45,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:45,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998969277] [2021-06-05 21:55:45,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:45,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:45,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:45,393 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:45,763 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-06-05 21:55:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:45,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:45,763 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:55:45,763 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:55:45,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:55:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2021-06-05 21:55:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-06-05 21:55:45,765 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-06-05 21:55:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:45,765 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-06-05 21:55:45,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-06-05 21:55:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:45,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:45,765 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:45,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:45,966 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash -511170933, now seen corresponding path program 463 times [2021-06-05 21:55:45,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:45,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797955641] [2021-06-05 21:55:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:46,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:46,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797955641] [2021-06-05 21:55:46,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797955641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:46,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596224221] [2021-06-05 21:55:46,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:46,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:46,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596224221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:46,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:46,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191479897] [2021-06-05 21:55:46,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:46,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:46,292 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:46,626 INFO L93 Difference]: Finished difference Result 221 states and 466 transitions. [2021-06-05 21:55:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:55:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:46,627 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:55:46,627 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 21:55:46,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 398.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 21:55:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2021-06-05 21:55:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.161111111111111) internal successors, (389), 180 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 389 transitions. [2021-06-05 21:55:46,629 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 389 transitions. Word has length 19 [2021-06-05 21:55:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:46,629 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 389 transitions. [2021-06-05 21:55:46,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 389 transitions. [2021-06-05 21:55:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:46,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:46,629 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:46,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-06-05 21:55:46,829 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 616225160, now seen corresponding path program 464 times [2021-06-05 21:55:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:46,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429177191] [2021-06-05 21:55:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:46,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:46,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429177191] [2021-06-05 21:55:46,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429177191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:46,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785511436] [2021-06-05 21:55:46,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:46,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:46,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:46,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:47,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785511436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:47,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:47,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:47,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683619817] [2021-06-05 21:55:47,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:47,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:47,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:47,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:47,188 INFO L87 Difference]: Start difference. First operand 181 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:47,449 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-06-05 21:55:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:47,450 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:55:47,450 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:55:47,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:55:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-06-05 21:55:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.16) internal successors, (378), 175 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 378 transitions. [2021-06-05 21:55:47,452 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 378 transitions. Word has length 19 [2021-06-05 21:55:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:47,452 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 378 transitions. [2021-06-05 21:55:47,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 378 transitions. [2021-06-05 21:55:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:47,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:47,452 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:47,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:47,652 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:47,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1122571426, now seen corresponding path program 465 times [2021-06-05 21:55:47,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:47,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612874282] [2021-06-05 21:55:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:47,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:47,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612874282] [2021-06-05 21:55:47,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612874282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:47,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682463870] [2021-06-05 21:55:47,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:55:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682463870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:47,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:47,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35346102] [2021-06-05 21:55:47,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:47,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:47,985 INFO L87 Difference]: Start difference. First operand 176 states and 378 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:48,353 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-06-05 21:55:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:55:48,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:48,354 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:55:48,354 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:55:48,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:55:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2021-06-05 21:55:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-06-05 21:55:48,356 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-06-05 21:55:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:48,356 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-06-05 21:55:48,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-06-05 21:55:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:48,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:48,356 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:48,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-06-05 21:55:48,556 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:48,557 INFO L82 PathProgramCache]: Analyzing trace with hash 584715848, now seen corresponding path program 466 times [2021-06-05 21:55:48,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:48,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486927860] [2021-06-05 21:55:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:48,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:48,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486927860] [2021-06-05 21:55:48,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486927860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:48,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707612271] [2021-06-05 21:55:48,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:48,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:48,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:48,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707612271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:48,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:48,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:48,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408485617] [2021-06-05 21:55:48,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:48,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:48,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:48,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:48,877 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:49,089 INFO L93 Difference]: Finished difference Result 209 states and 444 transitions. [2021-06-05 21:55:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:49,089 INFO L225 Difference]: With dead ends: 209 [2021-06-05 21:55:49,090 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 21:55:49,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 21:55:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-06-05 21:55:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.160919540229885) internal successors, (376), 174 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 376 transitions. [2021-06-05 21:55:49,091 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 376 transitions. Word has length 19 [2021-06-05 21:55:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:49,091 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 376 transitions. [2021-06-05 21:55:49,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 376 transitions. [2021-06-05 21:55:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:49,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:49,092 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:49,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:49,292 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:49,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1695154842, now seen corresponding path program 467 times [2021-06-05 21:55:49,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:49,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280134984] [2021-06-05 21:55:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:49,385 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 21:55:49,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280134984] [2021-06-05 21:55:49,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280134984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357339469] [2021-06-05 21:55:49,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:49,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:55:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:49,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357339469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:49,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:49,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:49,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065491931] [2021-06-05 21:55:49,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:49,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:49,614 INFO L87 Difference]: Start difference. First operand 175 states and 376 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:49,997 INFO L93 Difference]: Finished difference Result 227 states and 473 transitions. [2021-06-05 21:55:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:49,997 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:55:49,997 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 21:55:49,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 21:55:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 180. [2021-06-05 21:55:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-06-05 21:55:49,999 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-06-05 21:55:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:49,999 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-06-05 21:55:49,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-06-05 21:55:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:49,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:49,999 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:50,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3431,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:50,200 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:50,200 INFO L82 PathProgramCache]: Analyzing trace with hash -360563512, now seen corresponding path program 468 times [2021-06-05 21:55:50,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:50,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912360949] [2021-06-05 21:55:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:50,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:50,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912360949] [2021-06-05 21:55:50,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912360949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:50,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254330696] [2021-06-05 21:55:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:50,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:50,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:50,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254330696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:50,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:50,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:50,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832935749] [2021-06-05 21:55:50,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:50,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:50,506 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:50,951 INFO L93 Difference]: Finished difference Result 240 states and 500 transitions. [2021-06-05 21:55:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:50,951 INFO L225 Difference]: With dead ends: 240 [2021-06-05 21:55:50,951 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 21:55:50,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 21:55:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2021-06-05 21:55:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-06-05 21:55:50,953 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-06-05 21:55:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:50,953 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-06-05 21:55:50,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-06-05 21:55:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:50,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:50,953 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:51,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3439,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:51,154 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -898419090, now seen corresponding path program 469 times [2021-06-05 21:55:51,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:51,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634045375] [2021-06-05 21:55:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:51,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634045375] [2021-06-05 21:55:51,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634045375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207257439] [2021-06-05 21:55:51,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:51,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:51,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:51,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207257439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:51,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:51,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:51,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755827856] [2021-06-05 21:55:51,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:51,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:51,457 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:51,813 INFO L93 Difference]: Finished difference Result 222 states and 470 transitions. [2021-06-05 21:55:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:51,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:51,813 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:55:51,813 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 21:55:51,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 21:55:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 180. [2021-06-05 21:55:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-06-05 21:55:51,815 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-06-05 21:55:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:51,815 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-06-05 21:55:51,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-06-05 21:55:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:51,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:51,816 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:52,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3446,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:52,016 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash -392072824, now seen corresponding path program 470 times [2021-06-05 21:55:52,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:52,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539424861] [2021-06-05 21:55:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:52,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:52,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539424861] [2021-06-05 21:55:52,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539424861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:52,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661067125] [2021-06-05 21:55:52,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:52,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:52,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:52,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661067125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:52,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:52,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:52,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295958144] [2021-06-05 21:55:52,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:52,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:52,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:52,314 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:52,533 INFO L93 Difference]: Finished difference Result 215 states and 455 transitions. [2021-06-05 21:55:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:52,533 INFO L225 Difference]: With dead ends: 215 [2021-06-05 21:55:52,533 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 21:55:52,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 21:55:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 175. [2021-06-05 21:55:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-06-05 21:55:52,535 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-06-05 21:55:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:52,535 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-06-05 21:55:52,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-06-05 21:55:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:52,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:52,535 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:52,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3451 [2021-06-05 21:55:52,736 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:52,736 INFO L82 PathProgramCache]: Analyzing trace with hash -220502427, now seen corresponding path program 471 times [2021-06-05 21:55:52,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:52,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485792335] [2021-06-05 21:55:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:52,830 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 21:55:52,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:52,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485792335] [2021-06-05 21:55:52,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485792335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:52,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723930976] [2021-06-05 21:55:52,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:52,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:52,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:52,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:55:52,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:53,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723930976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:53,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:53,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:53,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384933118] [2021-06-05 21:55:53,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:53,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:53,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:53,134 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:53,690 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-06-05 21:55:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:53,691 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:55:53,691 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:55:53,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:55:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2021-06-05 21:55:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.151685393258427) internal successors, (383), 178 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 383 transitions. [2021-06-05 21:55:53,692 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 383 transitions. Word has length 19 [2021-06-05 21:55:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:53,692 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 383 transitions. [2021-06-05 21:55:53,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 383 transitions. [2021-06-05 21:55:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:53,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:53,693 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:53,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3456,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:53,893 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 67047808, now seen corresponding path program 472 times [2021-06-05 21:55:53,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:53,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338112170] [2021-06-05 21:55:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:53,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:53,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338112170] [2021-06-05 21:55:53,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338112170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:53,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021532337] [2021-06-05 21:55:53,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:54,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:54,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021532337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:54,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:54,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:54,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319476251] [2021-06-05 21:55:54,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:54,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:54,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:54,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:54,215 INFO L87 Difference]: Start difference. First operand 179 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:55,067 INFO L93 Difference]: Finished difference Result 247 states and 509 transitions. [2021-06-05 21:55:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:55:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:55,067 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:55:55,067 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:55:55,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 830.4ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:55:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:55:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2021-06-05 21:55:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.1767955801104972) internal successors, (394), 181 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 394 transitions. [2021-06-05 21:55:55,069 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 394 transitions. Word has length 19 [2021-06-05 21:55:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:55,069 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 394 transitions. [2021-06-05 21:55:55,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 394 transitions. [2021-06-05 21:55:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:55,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:55,069 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:55,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:55,270 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 369038088, now seen corresponding path program 473 times [2021-06-05 21:55:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138065823] [2021-06-05 21:55:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:55,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138065823] [2021-06-05 21:55:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138065823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736740751] [2021-06-05 21:55:55,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:55,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:55:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:55,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736740751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:55,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:55,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:55,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161337007] [2021-06-05 21:55:55,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:55,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:55,674 INFO L87 Difference]: Start difference. First operand 182 states and 394 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:56,267 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-06-05 21:55:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:56,268 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:55:56,268 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:55:56,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:55:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:55:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2021-06-05 21:55:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1777777777777776) internal successors, (392), 180 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 392 transitions. [2021-06-05 21:55:56,269 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 392 transitions. Word has length 19 [2021-06-05 21:55:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:56,270 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 392 transitions. [2021-06-05 21:55:56,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:56,270 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 392 transitions. [2021-06-05 21:55:56,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:56,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:56,270 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:56,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3471 [2021-06-05 21:55:56,470 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash 875384354, now seen corresponding path program 474 times [2021-06-05 21:55:56,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:56,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023730944] [2021-06-05 21:55:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:56,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:56,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023730944] [2021-06-05 21:55:56,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023730944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:56,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905603809] [2021-06-05 21:55:56,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:56,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:55:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:56,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:56,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905603809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:56,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:56,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:56,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660315517] [2021-06-05 21:55:56,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:56,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:56,794 INFO L87 Difference]: Start difference. First operand 181 states and 392 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:57,316 INFO L93 Difference]: Finished difference Result 224 states and 476 transitions. [2021-06-05 21:55:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:57,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:57,316 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:55:57,316 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:55:57,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:55:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:55:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 180. [2021-06-05 21:55:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.17877094972067) internal successors, (390), 179 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 390 transitions. [2021-06-05 21:55:57,318 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 390 transitions. Word has length 19 [2021-06-05 21:55:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:57,318 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 390 transitions. [2021-06-05 21:55:57,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 390 transitions. [2021-06-05 21:55:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:57,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:57,318 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:57,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:57,519 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash -607750584, now seen corresponding path program 475 times [2021-06-05 21:55:57,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:57,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240385048] [2021-06-05 21:55:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:57,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:57,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240385048] [2021-06-05 21:55:57,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240385048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:57,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884275176] [2021-06-05 21:55:57,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:57,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:57,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884275176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:57,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:57,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:57,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652496997] [2021-06-05 21:55:57,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:57,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:57,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:57,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:57,825 INFO L87 Difference]: Start difference. First operand 180 states and 390 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:58,122 INFO L93 Difference]: Finished difference Result 204 states and 433 transitions. [2021-06-05 21:55:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:58,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:58,123 INFO L225 Difference]: With dead ends: 204 [2021-06-05 21:55:58,123 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 21:55:58,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 21:55:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 175. [2021-06-05 21:55:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-06-05 21:55:58,125 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-06-05 21:55:58,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:58,125 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-06-05 21:55:58,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-06-05 21:55:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:58,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:58,125 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:58,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-06-05 21:55:58,325 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1039160257, now seen corresponding path program 476 times [2021-06-05 21:55:58,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:58,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409657303] [2021-06-05 21:55:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:58,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:58,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409657303] [2021-06-05 21:55:58,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409657303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:58,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948949846] [2021-06-05 21:55:58,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:58,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:55:58,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:58,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948949846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:58,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:58,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:58,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232219303] [2021-06-05 21:55:58,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:58,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:58,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:58,686 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:59,082 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-06-05 21:55:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:55:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:59,083 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:55:59,083 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:55:59,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:55:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 175. [2021-06-05 21:55:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-06-05 21:55:59,084 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-06-05 21:55:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:59,084 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-06-05 21:55:59,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-06-05 21:55:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:59,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:59,085 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:59,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:59,285 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1127721988, now seen corresponding path program 477 times [2021-06-05 21:55:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:59,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580715359] [2021-06-05 21:55:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:59,402 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 21:55:59,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580715359] [2021-06-05 21:55:59,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580715359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915711253] [2021-06-05 21:55:59,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:59,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:59,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:55:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:59,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915711253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:59,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:59,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598660233] [2021-06-05 21:55:59,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:59,648 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:00,079 INFO L93 Difference]: Finished difference Result 213 states and 439 transitions. [2021-06-05 21:56:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:56:00,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:00,080 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:56:00,080 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:56:00,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:56:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 175. [2021-06-05 21:56:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.132183908045977) internal successors, (371), 174 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 371 transitions. [2021-06-05 21:56:00,081 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 371 transitions. Word has length 19 [2021-06-05 21:56:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:00,081 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 371 transitions. [2021-06-05 21:56:00,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 371 transitions. [2021-06-05 21:56:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:00,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:00,082 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:00,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-06-05 21:56:00,282 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:00,282 INFO L82 PathProgramCache]: Analyzing trace with hash -242424505, now seen corresponding path program 478 times [2021-06-05 21:56:00,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:00,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5313850] [2021-06-05 21:56:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:00,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:00,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5313850] [2021-06-05 21:56:00,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5313850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:00,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77030603] [2021-06-05 21:56:00,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:00,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:00,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77030603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:00,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:00,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:00,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336797139] [2021-06-05 21:56:00,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:00,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:00,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:00,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:00,604 INFO L87 Difference]: Start difference. First operand 175 states and 371 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:01,080 INFO L93 Difference]: Finished difference Result 220 states and 456 transitions. [2021-06-05 21:56:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:56:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:01,081 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:56:01,081 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:56:01,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:56:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:56:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-06-05 21:56:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1264367816091956) internal successors, (370), 174 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 370 transitions. [2021-06-05 21:56:01,082 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 370 transitions. Word has length 19 [2021-06-05 21:56:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:01,082 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 370 transitions. [2021-06-05 21:56:01,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 370 transitions. [2021-06-05 21:56:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:01,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:01,083 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:01,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:01,283 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash 884971588, now seen corresponding path program 479 times [2021-06-05 21:56:01,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:01,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632425019] [2021-06-05 21:56:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:01,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:01,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632425019] [2021-06-05 21:56:01,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632425019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:01,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958121417] [2021-06-05 21:56:01,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:01,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:01,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:01,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:01,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:01,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958121417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:01,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:01,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:01,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069069026] [2021-06-05 21:56:01,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:01,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:01,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:01,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:01,641 INFO L87 Difference]: Start difference. First operand 175 states and 370 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:01,916 INFO L93 Difference]: Finished difference Result 196 states and 410 transitions. [2021-06-05 21:56:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:56:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:01,916 INFO L225 Difference]: With dead ends: 196 [2021-06-05 21:56:01,916 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:56:01,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:56:01,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-06-05 21:56:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-06-05 21:56:01,918 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-06-05 21:56:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:01,918 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-06-05 21:56:01,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-06-05 21:56:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:01,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:01,918 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:02,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-06-05 21:56:02,119 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1391317854, now seen corresponding path program 480 times [2021-06-05 21:56:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:02,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808939088] [2021-06-05 21:56:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:02,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:02,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808939088] [2021-06-05 21:56:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808939088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:02,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553782526] [2021-06-05 21:56:02,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:02,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:02,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:02,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:02,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553782526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:02,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:02,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:02,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153261210] [2021-06-05 21:56:02,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:02,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:02,438 INFO L87 Difference]: Start difference. First operand 170 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:02,797 INFO L93 Difference]: Finished difference Result 242 states and 497 transitions. [2021-06-05 21:56:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:56:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:02,798 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:56:02,798 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 21:56:02,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 21:56:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-06-05 21:56:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.132947976878613) internal successors, (369), 173 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 369 transitions. [2021-06-05 21:56:02,800 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 369 transitions. Word has length 19 [2021-06-05 21:56:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:02,800 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 369 transitions. [2021-06-05 21:56:02,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 369 transitions. [2021-06-05 21:56:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:02,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:02,800 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:03,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3514,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:03,001 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash 853462276, now seen corresponding path program 481 times [2021-06-05 21:56:03,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:03,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230410028] [2021-06-05 21:56:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:03,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:03,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230410028] [2021-06-05 21:56:03,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230410028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:03,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638447767] [2021-06-05 21:56:03,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:03,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:03,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638447767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:03,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:03,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:03,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193310757] [2021-06-05 21:56:03,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:03,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:03,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:03,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:03,333 INFO L87 Difference]: Start difference. First operand 174 states and 369 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:03,775 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-06-05 21:56:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:56:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:03,776 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:56:03,776 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 21:56:03,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 21:56:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 170. [2021-06-05 21:56:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-06-05 21:56:03,778 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-06-05 21:56:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:03,778 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-06-05 21:56:03,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-06-05 21:56:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:03,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:03,778 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:03,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:03,978 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash -91817084, now seen corresponding path program 482 times [2021-06-05 21:56:03,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:03,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694699455] [2021-06-05 21:56:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:04,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:04,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694699455] [2021-06-05 21:56:04,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694699455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:04,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587586169] [2021-06-05 21:56:04,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:04,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:04,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:04,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587586169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:04,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:04,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:04,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388002219] [2021-06-05 21:56:04,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:04,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:04,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:04,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:04,280 INFO L87 Difference]: Start difference. First operand 170 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:04,831 INFO L93 Difference]: Finished difference Result 251 states and 508 transitions. [2021-06-05 21:56:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:56:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:04,831 INFO L225 Difference]: With dead ends: 251 [2021-06-05 21:56:04,831 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 21:56:04,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 21:56:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 176. [2021-06-05 21:56:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.142857142857143) internal successors, (375), 175 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 375 transitions. [2021-06-05 21:56:04,833 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 375 transitions. Word has length 19 [2021-06-05 21:56:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:04,833 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 375 transitions. [2021-06-05 21:56:04,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 375 transitions. [2021-06-05 21:56:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:04,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:04,833 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:05,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:05,034 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -629672662, now seen corresponding path program 483 times [2021-06-05 21:56:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:05,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866326327] [2021-06-05 21:56:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:05,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:05,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866326327] [2021-06-05 21:56:05,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866326327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:05,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365154510] [2021-06-05 21:56:05,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:05,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:05,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:05,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365154510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:05,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:05,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:05,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386457042] [2021-06-05 21:56:05,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:05,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:05,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:05,341 INFO L87 Difference]: Start difference. First operand 176 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:05,727 INFO L93 Difference]: Finished difference Result 230 states and 480 transitions. [2021-06-05 21:56:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:56:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:05,728 INFO L225 Difference]: With dead ends: 230 [2021-06-05 21:56:05,728 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 21:56:05,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:56:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 21:56:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2021-06-05 21:56:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1436781609195403) internal successors, (373), 174 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 373 transitions. [2021-06-05 21:56:05,729 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 373 transitions. Word has length 19 [2021-06-05 21:56:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:05,729 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 373 transitions. [2021-06-05 21:56:05,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 373 transitions. [2021-06-05 21:56:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:05,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:05,732 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:05,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:05,948 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:05,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:05,948 INFO L82 PathProgramCache]: Analyzing trace with hash -123326396, now seen corresponding path program 484 times [2021-06-05 21:56:05,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:05,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574491190] [2021-06-05 21:56:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:06,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:06,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574491190] [2021-06-05 21:56:06,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574491190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072232986] [2021-06-05 21:56:06,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:06,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:06,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:06,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072232986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:06,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:06,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:06,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425267356] [2021-06-05 21:56:06,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:06,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:06,240 INFO L87 Difference]: Start difference. First operand 175 states and 373 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:06,540 INFO L93 Difference]: Finished difference Result 213 states and 444 transitions. [2021-06-05 21:56:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:06,540 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:56:06,540 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:56:06,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:56:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-06-05 21:56:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 166 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 353 transitions. [2021-06-05 21:56:06,542 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 353 transitions. Word has length 19 [2021-06-05 21:56:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:06,542 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 353 transitions. [2021-06-05 21:56:06,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 353 transitions. [2021-06-05 21:56:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:06,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:06,542 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:06,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:06,743 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash 48244001, now seen corresponding path program 485 times [2021-06-05 21:56:06,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:06,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519996181] [2021-06-05 21:56:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:06,838 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 21:56:06,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:06,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519996181] [2021-06-05 21:56:06,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519996181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:06,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935224945] [2021-06-05 21:56:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:06,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:07,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935224945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:07,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:07,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:07,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680155761] [2021-06-05 21:56:07,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:07,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:07,140 INFO L87 Difference]: Start difference. First operand 167 states and 353 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:07,619 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2021-06-05 21:56:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:07,620 INFO L225 Difference]: With dead ends: 185 [2021-06-05 21:56:07,620 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:56:07,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:56:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-06-05 21:56:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1077844311377247) internal successors, (352), 167 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 352 transitions. [2021-06-05 21:56:07,621 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 352 transitions. Word has length 19 [2021-06-05 21:56:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:07,621 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 352 transitions. [2021-06-05 21:56:07,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 352 transitions. [2021-06-05 21:56:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:07,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:07,622 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:07,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:07,822 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash 335794236, now seen corresponding path program 486 times [2021-06-05 21:56:07,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:07,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238370685] [2021-06-05 21:56:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:07,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:07,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238370685] [2021-06-05 21:56:07,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238370685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360435140] [2021-06-05 21:56:07,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:07,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:07,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:07,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:08,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360435140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:08,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:08,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:08,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911880739] [2021-06-05 21:56:08,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:08,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:08,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:08,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:08,145 INFO L87 Difference]: Start difference. First operand 168 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:08,855 INFO L93 Difference]: Finished difference Result 231 states and 460 transitions. [2021-06-05 21:56:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:56:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:08,856 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:56:08,856 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 21:56:08,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 715.9ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:56:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 21:56:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2021-06-05 21:56:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.13953488372093) internal successors, (368), 172 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 368 transitions. [2021-06-05 21:56:08,858 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 368 transitions. Word has length 19 [2021-06-05 21:56:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:08,858 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 368 transitions. [2021-06-05 21:56:08,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 368 transitions. [2021-06-05 21:56:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:08,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:08,858 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:09,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-05 21:56:09,058 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:09,059 INFO L82 PathProgramCache]: Analyzing trace with hash 637784516, now seen corresponding path program 487 times [2021-06-05 21:56:09,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:09,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539980676] [2021-06-05 21:56:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:09,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539980676] [2021-06-05 21:56:09,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539980676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026016716] [2021-06-05 21:56:09,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:09,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026016716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:09,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:09,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48324439] [2021-06-05 21:56:09,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:09,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:09,375 INFO L87 Difference]: Start difference. First operand 173 states and 368 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:09,743 INFO L93 Difference]: Finished difference Result 205 states and 428 transitions. [2021-06-05 21:56:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:09,744 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:56:09,744 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:56:09,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:56:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 172. [2021-06-05 21:56:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1403508771929824) internal successors, (366), 171 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 366 transitions. [2021-06-05 21:56:09,746 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 366 transitions. Word has length 19 [2021-06-05 21:56:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:09,746 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 366 transitions. [2021-06-05 21:56:09,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 366 transitions. [2021-06-05 21:56:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:09,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:09,746 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:09,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3558 [2021-06-05 21:56:09,947 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1144130782, now seen corresponding path program 488 times [2021-06-05 21:56:09,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:09,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645137068] [2021-06-05 21:56:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:10,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645137068] [2021-06-05 21:56:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645137068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733225384] [2021-06-05 21:56:10,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:10,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:10,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733225384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:10,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:10,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:10,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393929341] [2021-06-05 21:56:10,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:10,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:10,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:10,295 INFO L87 Difference]: Start difference. First operand 172 states and 366 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:10,651 INFO L93 Difference]: Finished difference Result 217 states and 453 transitions. [2021-06-05 21:56:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:10,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:10,651 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:56:10,651 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:56:10,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:56:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-06-05 21:56:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1411764705882352) internal successors, (364), 170 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 364 transitions. [2021-06-05 21:56:10,653 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 364 transitions. Word has length 19 [2021-06-05 21:56:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:10,653 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 364 transitions. [2021-06-05 21:56:10,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 364 transitions. [2021-06-05 21:56:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:10,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:10,654 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:10,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:10,854 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:10,854 INFO L82 PathProgramCache]: Analyzing trace with hash -339004156, now seen corresponding path program 489 times [2021-06-05 21:56:10,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:10,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823231349] [2021-06-05 21:56:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:10,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823231349] [2021-06-05 21:56:10,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823231349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217499549] [2021-06-05 21:56:10,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:10,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:10,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:10,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:11,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217499549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:11,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:11,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:11,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919294004] [2021-06-05 21:56:11,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:11,161 INFO L87 Difference]: Start difference. First operand 171 states and 364 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:11,521 INFO L93 Difference]: Finished difference Result 200 states and 415 transitions. [2021-06-05 21:56:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:11,521 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:56:11,521 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:56:11,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:56:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 164. [2021-06-05 21:56:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-06-05 21:56:11,523 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-06-05 21:56:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:11,523 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-06-05 21:56:11,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-06-05 21:56:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:11,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:11,523 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:11,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-06-05 21:56:11,724 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash 472555237, now seen corresponding path program 490 times [2021-06-05 21:56:11,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:11,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211818932] [2021-06-05 21:56:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:11,815 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 21:56:11,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:11,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211818932] [2021-06-05 21:56:11,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211818932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:11,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245372488] [2021-06-05 21:56:11,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:11,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:12,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245372488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:12,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:12,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:12,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212649299] [2021-06-05 21:56:12,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:12,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:12,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:12,118 INFO L87 Difference]: Start difference. First operand 164 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:12,646 INFO L93 Difference]: Finished difference Result 195 states and 398 transitions. [2021-06-05 21:56:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:56:12,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:12,647 INFO L225 Difference]: With dead ends: 195 [2021-06-05 21:56:12,647 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 21:56:12,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 21:56:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 164. [2021-06-05 21:56:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-06-05 21:56:12,648 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-06-05 21:56:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:12,648 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-06-05 21:56:12,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-06-05 21:56:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:12,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:12,648 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:12,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3573,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:12,849 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 760105472, now seen corresponding path program 491 times [2021-06-05 21:56:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:12,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253705122] [2021-06-05 21:56:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:12,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:12,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253705122] [2021-06-05 21:56:12,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253705122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:12,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511171084] [2021-06-05 21:56:12,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:12,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:12,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:13,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511171084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:13,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:13,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:13,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042225086] [2021-06-05 21:56:13,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:13,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:13,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:13,174 INFO L87 Difference]: Start difference. First operand 164 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:13,885 INFO L93 Difference]: Finished difference Result 228 states and 458 transitions. [2021-06-05 21:56:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:56:13,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:13,885 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:56:13,885 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:56:13,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:56:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:56:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 168. [2021-06-05 21:56:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 354 transitions. [2021-06-05 21:56:13,887 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 354 transitions. Word has length 19 [2021-06-05 21:56:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:13,887 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 354 transitions. [2021-06-05 21:56:13,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 354 transitions. [2021-06-05 21:56:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:13,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:13,887 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:14,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-06-05 21:56:14,088 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:14,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1062095752, now seen corresponding path program 492 times [2021-06-05 21:56:14,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:14,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513273620] [2021-06-05 21:56:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:14,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513273620] [2021-06-05 21:56:14,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513273620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355692387] [2021-06-05 21:56:14,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:14,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:14,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355692387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:14,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:14,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:14,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030675862] [2021-06-05 21:56:14,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:14,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:14,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:14,425 INFO L87 Difference]: Start difference. First operand 168 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:15,049 INFO L93 Difference]: Finished difference Result 226 states and 459 transitions. [2021-06-05 21:56:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:56:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:15,049 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:56:15,050 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:56:15,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 671.8ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:56:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:56:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 167. [2021-06-05 21:56:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-06-05 21:56:15,051 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 19 [2021-06-05 21:56:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:15,051 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-06-05 21:56:15,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-06-05 21:56:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:15,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:15,052 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:15,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:15,252 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1568442018, now seen corresponding path program 493 times [2021-06-05 21:56:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:15,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477079292] [2021-06-05 21:56:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:15,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:15,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477079292] [2021-06-05 21:56:15,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477079292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:15,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699156711] [2021-06-05 21:56:15,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:15,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699156711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:15,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:15,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:15,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574181301] [2021-06-05 21:56:15,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:15,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:15,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:15,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:15,569 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:16,203 INFO L93 Difference]: Finished difference Result 238 states and 484 transitions. [2021-06-05 21:56:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:56:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:16,203 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:56:16,203 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:56:16,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 666.0ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:56:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:56:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2021-06-05 21:56:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-06-05 21:56:16,205 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 19 [2021-06-05 21:56:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:16,205 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-06-05 21:56:16,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-06-05 21:56:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:16,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:16,205 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:16,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-06-05 21:56:16,406 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:16,406 INFO L82 PathProgramCache]: Analyzing trace with hash 85307080, now seen corresponding path program 494 times [2021-06-05 21:56:16,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:16,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910157502] [2021-06-05 21:56:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:16,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:16,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910157502] [2021-06-05 21:56:16,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910157502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:16,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957966411] [2021-06-05 21:56:16,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:16,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:16,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:56:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:16,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957966411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:16,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:16,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:16,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174054395] [2021-06-05 21:56:16,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:16,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:16,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:16,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:16,707 INFO L87 Difference]: Start difference. First operand 166 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:17,334 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2021-06-05 21:56:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:56:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:17,335 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:56:17,335 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 21:56:17,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:56:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 21:56:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2021-06-05 21:56:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-05 21:56:17,337 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 19 [2021-06-05 21:56:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:17,337 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-05 21:56:17,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-05 21:56:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:17,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:17,337 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:17,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:17,537 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash 930278532, now seen corresponding path program 495 times [2021-06-05 21:56:17,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:17,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612823897] [2021-06-05 21:56:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:17,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:17,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612823897] [2021-06-05 21:56:17,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612823897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:17,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574046422] [2021-06-05 21:56:17,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:17,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:56:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574046422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:17,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:56:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552711436] [2021-06-05 21:56:17,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:56:17,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:56:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:56:17,781 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:17,915 INFO L93 Difference]: Finished difference Result 219 states and 444 transitions. [2021-06-05 21:56:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:17,915 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:56:17,915 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:56:17,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:56:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 159. [2021-06-05 21:56:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1012658227848102) internal successors, (332), 158 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 332 transitions. [2021-06-05 21:56:17,917 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 332 transitions. Word has length 19 [2021-06-05 21:56:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:17,917 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 332 transitions. [2021-06-05 21:56:17,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 332 transitions. [2021-06-05 21:56:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:17,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:17,917 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:18,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:18,118 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:18,118 INFO L82 PathProgramCache]: Analyzing trace with hash 313289047, now seen corresponding path program 496 times [2021-06-05 21:56:18,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:18,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978592604] [2021-06-05 21:56:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:18,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:18,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978592604] [2021-06-05 21:56:18,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978592604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:18,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670423611] [2021-06-05 21:56:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:18,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:18,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:18,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:18,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:18,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670423611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:18,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:18,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:56:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609178269] [2021-06-05 21:56:18,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:56:18,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:18,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:56:18,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:56:18,859 INFO L87 Difference]: Start difference. First operand 159 states and 332 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:19,418 INFO L93 Difference]: Finished difference Result 250 states and 493 transitions. [2021-06-05 21:56:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:19,419 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:56:19,419 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 21:56:19,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 954.5ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:56:19,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 21:56:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2021-06-05 21:56:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.10062893081761) internal successors, (334), 159 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 334 transitions. [2021-06-05 21:56:19,421 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 334 transitions. Word has length 20 [2021-06-05 21:56:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:19,421 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 334 transitions. [2021-06-05 21:56:19,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 334 transitions. [2021-06-05 21:56:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:19,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:19,421 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:19,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-05 21:56:19,622 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2044100551, now seen corresponding path program 497 times [2021-06-05 21:56:19,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:19,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546838250] [2021-06-05 21:56:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:19,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:19,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546838250] [2021-06-05 21:56:19,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546838250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:19,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685686333] [2021-06-05 21:56:19,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:19,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:56:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:20,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685686333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:20,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:20,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:56:20,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998535537] [2021-06-05 21:56:20,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:56:20,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:56:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:56:20,332 INFO L87 Difference]: Start difference. First operand 160 states and 334 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:21,687 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 21:56:21,997 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-06-05 21:56:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:22,050 INFO L93 Difference]: Finished difference Result 282 states and 567 transitions. [2021-06-05 21:56:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:56:22,050 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:22,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:22,050 INFO L225 Difference]: With dead ends: 282 [2021-06-05 21:56:22,050 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 21:56:22,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1881.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:56:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 21:56:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 164. [2021-06-05 21:56:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1165644171779143) internal successors, (345), 163 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 345 transitions. [2021-06-05 21:56:22,052 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 345 transitions. Word has length 20 [2021-06-05 21:56:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:22,052 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 345 transitions. [2021-06-05 21:56:22,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 345 transitions. [2021-06-05 21:56:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:22,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:22,052 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:22,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:22,253 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -983322461, now seen corresponding path program 498 times [2021-06-05 21:56:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615393193] [2021-06-05 21:56:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:22,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:22,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615393193] [2021-06-05 21:56:22,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615393193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:22,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689977156] [2021-06-05 21:56:22,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:22,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:56:22,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:22,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689977156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:22,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:22,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:22,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196638659] [2021-06-05 21:56:22,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:22,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:22,950 INFO L87 Difference]: Start difference. First operand 164 states and 345 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:23,801 INFO L93 Difference]: Finished difference Result 214 states and 421 transitions. [2021-06-05 21:56:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:23,801 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:23,802 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:56:23,802 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:56:23,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1167.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:56:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:56:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-06-05 21:56:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1151515151515152) internal successors, (349), 165 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 349 transitions. [2021-06-05 21:56:23,803 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 349 transitions. Word has length 20 [2021-06-05 21:56:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:23,803 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 349 transitions. [2021-06-05 21:56:23,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 349 transitions. [2021-06-05 21:56:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:23,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:23,803 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:24,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:24,004 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:24,004 INFO L82 PathProgramCache]: Analyzing trace with hash -685269503, now seen corresponding path program 499 times [2021-06-05 21:56:24,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:24,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851541897] [2021-06-05 21:56:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:24,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851541897] [2021-06-05 21:56:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851541897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668371040] [2021-06-05 21:56:24,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:24,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:24,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:24,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668371040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:24,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:24,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:24,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935054399] [2021-06-05 21:56:24,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:24,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:24,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:24,694 INFO L87 Difference]: Start difference. First operand 166 states and 349 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:25,753 INFO L93 Difference]: Finished difference Result 231 states and 458 transitions. [2021-06-05 21:56:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:56:25,754 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:25,754 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:56:25,754 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:56:25,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1208.7ms TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:56:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:56:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2021-06-05 21:56:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-06-05 21:56:25,756 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 20 [2021-06-05 21:56:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:25,756 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-06-05 21:56:25,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-06-05 21:56:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:25,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:25,756 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:25,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3644 [2021-06-05 21:56:25,956 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1956744419, now seen corresponding path program 500 times [2021-06-05 21:56:25,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:25,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002371640] [2021-06-05 21:56:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:26,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:26,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002371640] [2021-06-05 21:56:26,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002371640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:26,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299666777] [2021-06-05 21:56:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:26,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:26,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 21:56:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:26,520 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 21:56:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:26,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299666777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:26,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:26,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237451612] [2021-06-05 21:56:26,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:26,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:26,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:26,853 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:27,816 INFO L93 Difference]: Finished difference Result 221 states and 433 transitions. [2021-06-05 21:56:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:56:27,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:27,816 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:56:27,816 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:56:27,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1361.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:56:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:56:27,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2021-06-05 21:56:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1137724550898205) internal successors, (353), 167 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 353 transitions. [2021-06-05 21:56:27,818 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 353 transitions. Word has length 20 [2021-06-05 21:56:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:27,818 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 353 transitions. [2021-06-05 21:56:27,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,818 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 353 transitions. [2021-06-05 21:56:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:27,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:27,818 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:28,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3659,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:28,018 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash 379402689, now seen corresponding path program 501 times [2021-06-05 21:56:28,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:28,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122312107] [2021-06-05 21:56:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:28,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:28,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122312107] [2021-06-05 21:56:28,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122312107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:28,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373334442] [2021-06-05 21:56:28,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:28,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:56:28,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:28,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 21:56:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:28,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373334442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:28,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:28,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:28,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016625739] [2021-06-05 21:56:28,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:28,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:28,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:28,796 INFO L87 Difference]: Start difference. First operand 168 states and 353 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:29,535 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 21:56:29,883 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2021-06-05 21:56:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:30,067 INFO L93 Difference]: Finished difference Result 250 states and 485 transitions. [2021-06-05 21:56:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:56:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:30,068 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:56:30,068 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 21:56:30,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1521.6ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:56:30,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 21:56:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 172. [2021-06-05 21:56:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.128654970760234) internal successors, (364), 171 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 364 transitions. [2021-06-05 21:56:30,069 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 364 transitions. Word has length 20 [2021-06-05 21:56:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:30,070 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 364 transitions. [2021-06-05 21:56:30,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 364 transitions. [2021-06-05 21:56:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:30,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:30,070 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:30,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 21:56:30,285 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1713994019, now seen corresponding path program 502 times [2021-06-05 21:56:30,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:30,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636264322] [2021-06-05 21:56:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:30,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636264322] [2021-06-05 21:56:30,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636264322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537124126] [2021-06-05 21:56:30,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:30,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:30,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:30,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:30,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:31,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537124126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:31,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:31,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:31,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645864028] [2021-06-05 21:56:31,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:31,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:31,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:31,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:31,046 INFO L87 Difference]: Start difference. First operand 172 states and 364 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:31,967 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 21:56:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:32,429 INFO L93 Difference]: Finished difference Result 250 states and 481 transitions. [2021-06-05 21:56:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:56:32,429 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:32,429 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:56:32,429 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:56:32,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1600.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:56:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:56:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 171. [2021-06-05 21:56:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 21:56:32,431 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 21:56:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:32,431 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 21:56:32,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 21:56:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:32,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:32,431 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:32,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3684,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:32,632 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:32,632 INFO L82 PathProgramCache]: Analyzing trace with hash 582187675, now seen corresponding path program 503 times [2021-06-05 21:56:32,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:32,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881000771] [2021-06-05 21:56:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:32,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:32,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881000771] [2021-06-05 21:56:32,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881000771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:32,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322687265] [2021-06-05 21:56:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:32,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:56:32,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:33,183 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:56:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:33,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322687265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:33,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:33,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:33,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996810057] [2021-06-05 21:56:33,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:33,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:33,401 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:34,253 INFO L93 Difference]: Finished difference Result 220 states and 435 transitions. [2021-06-05 21:56:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:56:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:34,253 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:56:34,253 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:56:34,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1174.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:56:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:56:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 175. [2021-06-05 21:56:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1149425287356323) internal successors, (368), 174 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 368 transitions. [2021-06-05 21:56:34,255 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 368 transitions. Word has length 20 [2021-06-05 21:56:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:34,255 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 368 transitions. [2021-06-05 21:56:34,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 368 transitions. [2021-06-05 21:56:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:34,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:34,255 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:34,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:34,456 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1070765699, now seen corresponding path program 504 times [2021-06-05 21:56:34,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:34,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936763278] [2021-06-05 21:56:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:34,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936763278] [2021-06-05 21:56:34,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936763278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809560863] [2021-06-05 21:56:34,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:34,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:56:34,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:34,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:35,026 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:56:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:35,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809560863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:35,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:35,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:35,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764135059] [2021-06-05 21:56:35,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:35,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:35,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:35,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:35,257 INFO L87 Difference]: Start difference. First operand 175 states and 368 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:36,143 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-06-05 21:56:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:56:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:36,144 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:56:36,144 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:56:36,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1236.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:56:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:56:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-06-05 21:56:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1142857142857143) internal successors, (370), 175 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 370 transitions. [2021-06-05 21:56:36,145 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 370 transitions. Word has length 20 [2021-06-05 21:56:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:36,145 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 370 transitions. [2021-06-05 21:56:36,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 370 transitions. [2021-06-05 21:56:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:36,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:36,146 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:36,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-06-05 21:56:36,346 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1646859867, now seen corresponding path program 505 times [2021-06-05 21:56:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:36,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967674020] [2021-06-05 21:56:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:36,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967674020] [2021-06-05 21:56:36,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967674020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41521695] [2021-06-05 21:56:36,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:36,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:36,943 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:56:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:37,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41521695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:37,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:37,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706832836] [2021-06-05 21:56:37,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:37,190 INFO L87 Difference]: Start difference. First operand 176 states and 370 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:38,257 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-05 21:56:38,468 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-06-05 21:56:38,652 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-05 21:56:38,923 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 21:56:39,223 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 21:56:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:39,454 INFO L93 Difference]: Finished difference Result 280 states and 546 transitions. [2021-06-05 21:56:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:56:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:39,455 INFO L225 Difference]: With dead ends: 280 [2021-06-05 21:56:39,455 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:56:39,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2532.8ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:56:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:56:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 182. [2021-06-05 21:56:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.149171270718232) internal successors, (389), 181 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 389 transitions. [2021-06-05 21:56:39,457 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 389 transitions. Word has length 20 [2021-06-05 21:56:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:39,457 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 389 transitions. [2021-06-05 21:56:39,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 389 transitions. [2021-06-05 21:56:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:39,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:39,457 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:39,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:39,663 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1313516099, now seen corresponding path program 506 times [2021-06-05 21:56:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:39,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038210121] [2021-06-05 21:56:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:39,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:39,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038210121] [2021-06-05 21:56:39,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038210121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:39,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920103581] [2021-06-05 21:56:39,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:39,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:39,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:39,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:39,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:40,201 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:56:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:40,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920103581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:40,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:40,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:40,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210468123] [2021-06-05 21:56:40,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:40,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:40,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:40,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:40,451 INFO L87 Difference]: Start difference. First operand 182 states and 389 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:41,592 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-06-05 21:56:41,772 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-06-05 21:56:41,979 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-05 21:56:42,111 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 21:56:42,298 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-05 21:56:42,491 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-05 21:56:42,632 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-05 21:56:42,780 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-05 21:56:43,302 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-05 21:56:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:43,415 INFO L93 Difference]: Finished difference Result 307 states and 587 transitions. [2021-06-05 21:56:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:56:43,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:43,416 INFO L225 Difference]: With dead ends: 307 [2021-06-05 21:56:43,416 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 21:56:43,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3148.5ms TimeCoverageRelationStatistics Valid=342, Invalid=2628, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:56:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 21:56:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 182. [2021-06-05 21:56:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.154696132596685) internal successors, (390), 181 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 390 transitions. [2021-06-05 21:56:43,418 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 390 transitions. Word has length 20 [2021-06-05 21:56:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:43,418 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 390 transitions. [2021-06-05 21:56:43,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 390 transitions. [2021-06-05 21:56:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:43,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:43,419 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:43,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:43,619 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1741066659, now seen corresponding path program 507 times [2021-06-05 21:56:43,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:43,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369907118] [2021-06-05 21:56:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:43,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:43,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369907118] [2021-06-05 21:56:43,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369907118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:43,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300728412] [2021-06-05 21:56:43,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:43,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:43,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:44,188 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:56:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:44,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300728412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:44,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:44,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:44,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955721463] [2021-06-05 21:56:44,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:44,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:44,367 INFO L87 Difference]: Start difference. First operand 182 states and 390 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:45,389 INFO L93 Difference]: Finished difference Result 229 states and 462 transitions. [2021-06-05 21:56:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:56:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:45,390 INFO L225 Difference]: With dead ends: 229 [2021-06-05 21:56:45,390 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:56:45,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1307.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:56:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:56:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-06-05 21:56:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 183 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 394 transitions. [2021-06-05 21:56:45,392 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 394 transitions. Word has length 20 [2021-06-05 21:56:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:45,392 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 394 transitions. [2021-06-05 21:56:45,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 394 transitions. [2021-06-05 21:56:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:45,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:45,392 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:45,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3745,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:45,592 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash 163724929, now seen corresponding path program 508 times [2021-06-05 21:56:45,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:45,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129363973] [2021-06-05 21:56:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:45,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:45,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129363973] [2021-06-05 21:56:45,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129363973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:45,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573825361] [2021-06-05 21:56:45,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:45,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:45,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:45,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:46,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573825361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:46,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:46,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:46,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808838853] [2021-06-05 21:56:46,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:46,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:46,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:46,330 INFO L87 Difference]: Start difference. First operand 184 states and 394 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:48,169 INFO L93 Difference]: Finished difference Result 256 states and 512 transitions. [2021-06-05 21:56:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:56:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:48,169 INFO L225 Difference]: With dead ends: 256 [2021-06-05 21:56:48,169 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 21:56:48,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1945.9ms TimeCoverageRelationStatistics Valid=224, Invalid=2326, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:56:48,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 21:56:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-06-05 21:56:48,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1675675675675676) internal successors, (401), 185 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 401 transitions. [2021-06-05 21:56:48,171 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 401 transitions. Word has length 20 [2021-06-05 21:56:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:48,171 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 401 transitions. [2021-06-05 21:56:48,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 401 transitions. [2021-06-05 21:56:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:48,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:48,171 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:48,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3757 [2021-06-05 21:56:48,372 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:48,372 INFO L82 PathProgramCache]: Analyzing trace with hash 670071195, now seen corresponding path program 509 times [2021-06-05 21:56:48,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:48,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632301431] [2021-06-05 21:56:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:48,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:48,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632301431] [2021-06-05 21:56:48,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632301431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:48,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307142583] [2021-06-05 21:56:48,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:48,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:48,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:49,005 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:56:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:49,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307142583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:49,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:49,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:49,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112588039] [2021-06-05 21:56:49,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:49,137 INFO L87 Difference]: Start difference. First operand 186 states and 401 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:50,557 INFO L93 Difference]: Finished difference Result 258 states and 517 transitions. [2021-06-05 21:56:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:56:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:50,558 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:56:50,558 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 21:56:50,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1647.8ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:56:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 21:56:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 188. [2021-06-05 21:56:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.165775401069519) internal successors, (405), 187 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 405 transitions. [2021-06-05 21:56:50,560 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 405 transitions. Word has length 20 [2021-06-05 21:56:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:50,560 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 405 transitions. [2021-06-05 21:56:50,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 405 transitions. [2021-06-05 21:56:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:50,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:50,560 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:50,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:50,760 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1466806947, now seen corresponding path program 510 times [2021-06-05 21:56:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47281031] [2021-06-05 21:56:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:50,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:50,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47281031] [2021-06-05 21:56:50,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47281031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701394283] [2021-06-05 21:56:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:50,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:56:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:50,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:51,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701394283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:51,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:51,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:51,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921664261] [2021-06-05 21:56:51,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:51,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:51,399 INFO L87 Difference]: Start difference. First operand 188 states and 405 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:53,921 INFO L93 Difference]: Finished difference Result 312 states and 610 transitions. [2021-06-05 21:56:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:56:53,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:53,921 INFO L225 Difference]: With dead ends: 312 [2021-06-05 21:56:53,921 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 21:56:53,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2545.6ms TimeCoverageRelationStatistics Valid=437, Invalid=3985, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 21:56:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 21:56:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 198. [2021-06-05 21:56:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1624365482233503) internal successors, (426), 197 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 426 transitions. [2021-06-05 21:56:53,923 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 426 transitions. Word has length 20 [2021-06-05 21:56:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:53,923 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 426 transitions. [2021-06-05 21:56:53,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 426 transitions. [2021-06-05 21:56:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:53,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:53,924 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:54,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:54,124 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1836027257, now seen corresponding path program 511 times [2021-06-05 21:56:54,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:54,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457630814] [2021-06-05 21:56:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:54,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:54,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457630814] [2021-06-05 21:56:54,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457630814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:54,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462576612] [2021-06-05 21:56:54,369 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 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:54,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462576612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:54,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:54,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:54,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013658825] [2021-06-05 21:56:54,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:54,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:54,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:54,871 INFO L87 Difference]: Start difference. First operand 198 states and 426 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:55,624 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-06-05 21:56:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:55,624 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:56:55,624 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:56:55,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1144.1ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:56:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:56:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-06-05 21:56:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1616161616161618) internal successors, (428), 198 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 428 transitions. [2021-06-05 21:56:55,626 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 428 transitions. Word has length 20 [2021-06-05 21:56:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:55,626 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 428 transitions. [2021-06-05 21:56:55,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 428 transitions. [2021-06-05 21:56:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:55,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:55,626 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:55,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-06-05 21:56:55,827 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:55,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2134080215, now seen corresponding path program 512 times [2021-06-05 21:56:55,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:55,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397676020] [2021-06-05 21:56:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:56,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:56,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397676020] [2021-06-05 21:56:56,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397676020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:56,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299789054] [2021-06-05 21:56:56,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:56,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:56,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:56:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:56,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299789054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:56,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:56,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:56,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648558533] [2021-06-05 21:56:56,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:56,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:56,645 INFO L87 Difference]: Start difference. First operand 199 states and 428 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:57,456 INFO L93 Difference]: Finished difference Result 221 states and 461 transitions. [2021-06-05 21:56:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:57,457 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:56:57,457 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 21:56:57,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1228.5ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:56:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 21:56:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-06-05 21:56:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 199 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 430 transitions. [2021-06-05 21:56:57,459 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 430 transitions. Word has length 20 [2021-06-05 21:56:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:57,459 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 430 transitions. [2021-06-05 21:56:57,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 430 transitions. [2021-06-05 21:56:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:57,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:57,459 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:57,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3810,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:57,660 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 481126841, now seen corresponding path program 513 times [2021-06-05 21:56:57,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:57,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614133950] [2021-06-05 21:56:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:57,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:57,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614133950] [2021-06-05 21:56:57,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614133950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:57,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272179501] [2021-06-05 21:56:57,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:57,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:56:57,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:57,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:57,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:58,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272179501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:58,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:58,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:56:58,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494347830] [2021-06-05 21:56:58,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:56:58,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:56:58,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:58,505 INFO L87 Difference]: Start difference. First operand 200 states and 430 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:59,286 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-06-05 21:56:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:56:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:59,287 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:56:59,287 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:56:59,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1197.7ms TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:56:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:56:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2021-06-05 21:56:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.16) internal successors, (432), 200 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 432 transitions. [2021-06-05 21:56:59,289 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 432 transitions. Word has length 20 [2021-06-05 21:56:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:59,289 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 432 transitions. [2021-06-05 21:56:59,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 432 transitions. [2021-06-05 21:56:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:56:59,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:59,289 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:59,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:59,489 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1096214889, now seen corresponding path program 514 times [2021-06-05 21:56:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:59,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358145236] [2021-06-05 21:56:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:59,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:59,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358145236] [2021-06-05 21:56:59,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358145236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:59,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331460085] [2021-06-05 21:56:59,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:59,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:59,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:59,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:56:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331460085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:00,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:00,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:00,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047512685] [2021-06-05 21:57:00,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:00,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:00,353 INFO L87 Difference]: Start difference. First operand 201 states and 432 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:01,133 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-05 21:57:01,471 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-05 21:57:01,701 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-05 21:57:02,042 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-06-05 21:57:02,341 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 21:57:02,482 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 21:57:02,765 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-05 21:57:03,051 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 21:57:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:03,095 INFO L93 Difference]: Finished difference Result 280 states and 569 transitions. [2021-06-05 21:57:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:57:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:03,096 INFO L225 Difference]: With dead ends: 280 [2021-06-05 21:57:03,096 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:57:03,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3077.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:57:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:57:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2021-06-05 21:57:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1893203883495147) internal successors, (451), 206 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-06-05 21:57:03,098 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 20 [2021-06-05 21:57:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:03,098 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-06-05 21:57:03,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-06-05 21:57:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:03,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:03,098 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:03,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3834,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:03,299 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash -256963049, now seen corresponding path program 515 times [2021-06-05 21:57:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:03,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006494908] [2021-06-05 21:57:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:03,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006494908] [2021-06-05 21:57:03,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006494908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783882517] [2021-06-05 21:57:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:03,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:57:03,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:03,842 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:04,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783882517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:04,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:04,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:04,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527977186] [2021-06-05 21:57:04,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:04,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:04,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:04,049 INFO L87 Difference]: Start difference. First operand 207 states and 451 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:04,468 INFO L93 Difference]: Finished difference Result 231 states and 488 transitions. [2021-06-05 21:57:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:04,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:04,469 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:57:04,469 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:57:04,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:57:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:57:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2021-06-05 21:57:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.186602870813397) internal successors, (457), 209 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 457 transitions. [2021-06-05 21:57:04,471 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 457 transitions. Word has length 20 [2021-06-05 21:57:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:04,471 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 457 transitions. [2021-06-05 21:57:04,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 457 transitions. [2021-06-05 21:57:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:04,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:04,471 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:04,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:04,671 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1909916423, now seen corresponding path program 516 times [2021-06-05 21:57:04,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:04,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145275435] [2021-06-05 21:57:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:04,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:04,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145275435] [2021-06-05 21:57:04,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145275435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:04,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365544173] [2021-06-05 21:57:04,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:04,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:57:04,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:04,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:05,218 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:05,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365544173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:05,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:05,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:05,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431198657] [2021-06-05 21:57:05,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:05,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:05,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:05,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:05,435 INFO L87 Difference]: Start difference. First operand 210 states and 457 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:05,958 INFO L93 Difference]: Finished difference Result 231 states and 489 transitions. [2021-06-05 21:57:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:05,958 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:57:05,959 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 21:57:05,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:57:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 21:57:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2021-06-05 21:57:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1857142857142855) internal successors, (459), 210 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 459 transitions. [2021-06-05 21:57:05,960 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 459 transitions. Word has length 20 [2021-06-05 21:57:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:05,960 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 459 transitions. [2021-06-05 21:57:05,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 459 transitions. [2021-06-05 21:57:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:05,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:05,961 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:06,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-06-05 21:57:06,161 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 807709143, now seen corresponding path program 517 times [2021-06-05 21:57:06,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:06,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492032672] [2021-06-05 21:57:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:06,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492032672] [2021-06-05 21:57:06,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492032672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45641749] [2021-06-05 21:57:06,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:06,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:06,686 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45641749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:06,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:06,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:06,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864981803] [2021-06-05 21:57:06,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:06,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:06,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:06,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:06,919 INFO L87 Difference]: Start difference. First operand 211 states and 459 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:07,460 INFO L93 Difference]: Finished difference Result 243 states and 510 transitions. [2021-06-05 21:57:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:07,461 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:57:07,461 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 21:57:07,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 908.5ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:57:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 21:57:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-06-05 21:57:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.184834123222749) internal successors, (461), 211 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-06-05 21:57:07,462 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-06-05 21:57:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:07,463 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-06-05 21:57:07,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-06-05 21:57:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:07,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:07,463 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:07,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-06-05 21:57:07,663 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:07,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2142300473, now seen corresponding path program 518 times [2021-06-05 21:57:07,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:07,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522276897] [2021-06-05 21:57:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:07,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:07,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522276897] [2021-06-05 21:57:07,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522276897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:07,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390464050] [2021-06-05 21:57:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:07,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:08,166 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:08,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390464050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:08,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:08,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:08,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341805105] [2021-06-05 21:57:08,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:08,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:08,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:08,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:08,403 INFO L87 Difference]: Start difference. First operand 212 states and 461 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:08,976 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 21:57:09,186 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-06-05 21:57:09,320 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 21:57:09,507 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-06-05 21:57:09,758 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 21:57:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:10,267 INFO L93 Difference]: Finished difference Result 341 states and 671 transitions. [2021-06-05 21:57:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:57:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:10,267 INFO L225 Difference]: With dead ends: 341 [2021-06-05 21:57:10,267 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 21:57:10,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2027.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:57:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 21:57:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2021-06-05 21:57:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2009345794392523) internal successors, (471), 214 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 471 transitions. [2021-06-05 21:57:10,270 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 471 transitions. Word has length 20 [2021-06-05 21:57:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:10,270 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 471 transitions. [2021-06-05 21:57:10,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 471 transitions. [2021-06-05 21:57:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:10,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:10,270 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:10,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3882,519 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:10,470 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:10,471 INFO L82 PathProgramCache]: Analyzing trace with hash 901915935, now seen corresponding path program 519 times [2021-06-05 21:57:10,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:10,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893812160] [2021-06-05 21:57:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:10,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:10,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893812160] [2021-06-05 21:57:10,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893812160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:10,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375967953] [2021-06-05 21:57:10,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:10,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:10,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:10,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:11,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375967953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:11,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:11,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:11,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208926605] [2021-06-05 21:57:11,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:11,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:11,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:11,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:11,191 INFO L87 Difference]: Start difference. First operand 215 states and 471 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:11,718 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-05 21:57:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:11,959 INFO L93 Difference]: Finished difference Result 248 states and 523 transitions. [2021-06-05 21:57:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:11,960 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:57:11,960 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 21:57:11,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1085.9ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:57:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 21:57:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 217. [2021-06-05 21:57:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2037037037037037) internal successors, (476), 216 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-06-05 21:57:11,962 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-06-05 21:57:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:11,962 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-06-05 21:57:11,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-06-05 21:57:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:11,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:11,962 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:12,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:12,163 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash -675425795, now seen corresponding path program 520 times [2021-06-05 21:57:12,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:12,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535259880] [2021-06-05 21:57:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:12,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:12,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535259880] [2021-06-05 21:57:12,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535259880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:12,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666668043] [2021-06-05 21:57:12,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:12,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:12,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:12,708 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:12,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666668043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:12,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:12,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:12,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859609497] [2021-06-05 21:57:12,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:12,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:12,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:12,884 INFO L87 Difference]: Start difference. First operand 217 states and 476 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:13,586 INFO L93 Difference]: Finished difference Result 254 states and 532 transitions. [2021-06-05 21:57:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:13,586 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:13,587 INFO L225 Difference]: With dead ends: 254 [2021-06-05 21:57:13,587 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:57:13,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1004.8ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:57:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:57:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2021-06-05 21:57:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.19815668202765) internal successors, (477), 217 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 477 transitions. [2021-06-05 21:57:13,589 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 477 transitions. Word has length 20 [2021-06-05 21:57:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:13,589 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 477 transitions. [2021-06-05 21:57:13,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 477 transitions. [2021-06-05 21:57:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:13,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:13,589 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:13,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:13,789 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:13,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash 659165535, now seen corresponding path program 521 times [2021-06-05 21:57:13,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:13,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593639278] [2021-06-05 21:57:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:13,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:13,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593639278] [2021-06-05 21:57:13,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593639278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:13,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818977709] [2021-06-05 21:57:13,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:14,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:14,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:14,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:14,283 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818977709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:14,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:14,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406955149] [2021-06-05 21:57:14,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:14,445 INFO L87 Difference]: Start difference. First operand 218 states and 477 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:15,918 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-06-05 21:57:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:57:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:15,919 INFO L225 Difference]: With dead ends: 308 [2021-06-05 21:57:15,919 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 21:57:15,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1660.4ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:57:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 21:57:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 220. [2021-06-05 21:57:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-06-05 21:57:15,921 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-06-05 21:57:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:15,921 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-06-05 21:57:15,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-06-05 21:57:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:15,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:15,921 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:16,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3921,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:16,122 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:16,122 INFO L82 PathProgramCache]: Analyzing trace with hash -169079529, now seen corresponding path program 522 times [2021-06-05 21:57:16,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:16,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612833742] [2021-06-05 21:57:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:16,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612833742] [2021-06-05 21:57:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612833742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323969582] [2021-06-05 21:57:16,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:16,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:16,652 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:16,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323969582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:16,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:16,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:16,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932437535] [2021-06-05 21:57:16,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:16,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:16,769 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:17,607 INFO L93 Difference]: Finished difference Result 273 states and 580 transitions. [2021-06-05 21:57:17,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:57:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:17,608 INFO L225 Difference]: With dead ends: 273 [2021-06-05 21:57:17,608 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 21:57:17,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1067.0ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:57:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 21:57:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 220. [2021-06-05 21:57:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-06-05 21:57:17,610 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-06-05 21:57:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:17,610 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-06-05 21:57:17,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-06-05 21:57:17,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:17,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:17,610 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:17,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3933,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:17,811 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:17,811 INFO L82 PathProgramCache]: Analyzing trace with hash -212189635, now seen corresponding path program 523 times [2021-06-05 21:57:17,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:17,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431688318] [2021-06-05 21:57:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:17,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431688318] [2021-06-05 21:57:17,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431688318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413792345] [2021-06-05 21:57:17,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:18,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:18,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:18,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413792345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:18,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:18,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:18,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155732096] [2021-06-05 21:57:18,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:18,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:18,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:18,371 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:19,111 INFO L93 Difference]: Finished difference Result 284 states and 592 transitions. [2021-06-05 21:57:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:57:19,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:19,112 INFO L225 Difference]: With dead ends: 284 [2021-06-05 21:57:19,112 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 21:57:19,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 898.5ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:57:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 21:57:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 225. [2021-06-05 21:57:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2276785714285716) internal successors, (499), 224 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 499 transitions. [2021-06-05 21:57:19,114 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 499 transitions. Word has length 20 [2021-06-05 21:57:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:19,114 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 499 transitions. [2021-06-05 21:57:19,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 499 transitions. [2021-06-05 21:57:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:19,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:19,115 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:19,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:19,315 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2125594183, now seen corresponding path program 524 times [2021-06-05 21:57:19,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:19,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417225140] [2021-06-05 21:57:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:19,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:19,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417225140] [2021-06-05 21:57:19,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417225140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:19,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793284102] [2021-06-05 21:57:19,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:19,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:19,867 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:20,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793284102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:20,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:20,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:20,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310310761] [2021-06-05 21:57:20,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:20,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:20,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:20,033 INFO L87 Difference]: Start difference. First operand 225 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:20,402 INFO L93 Difference]: Finished difference Result 247 states and 533 transitions. [2021-06-05 21:57:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:20,402 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:57:20,402 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:57:20,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:57:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:57:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-06-05 21:57:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-06-05 21:57:20,404 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-06-05 21:57:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:20,405 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-06-05 21:57:20,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-06-05 21:57:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:20,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:20,405 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:20,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:20,605 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 592031383, now seen corresponding path program 525 times [2021-06-05 21:57:20,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:20,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094039081] [2021-06-05 21:57:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:20,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094039081] [2021-06-05 21:57:20,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094039081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458027172] [2021-06-05 21:57:20,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:20,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:20,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:20,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:21,165 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:21,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458027172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:21,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:21,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157571925] [2021-06-05 21:57:21,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:21,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:21,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:21,348 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:22,127 INFO L93 Difference]: Finished difference Result 279 states and 585 transitions. [2021-06-05 21:57:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:57:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:22,128 INFO L225 Difference]: With dead ends: 279 [2021-06-05 21:57:22,128 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 21:57:22,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1074.0ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:57:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 21:57:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-06-05 21:57:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-06-05 21:57:22,130 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-06-05 21:57:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:22,130 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-06-05 21:57:22,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-06-05 21:57:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:22,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:22,130 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:22,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-05 21:57:22,331 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1098377649, now seen corresponding path program 526 times [2021-06-05 21:57:22,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:22,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417382311] [2021-06-05 21:57:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:22,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:22,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417382311] [2021-06-05 21:57:22,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417382311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:22,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038762301] [2021-06-05 21:57:22,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:22,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:22,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:23,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038762301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:23,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:23,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:23,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620555033] [2021-06-05 21:57:23,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:23,024 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:24,209 INFO L93 Difference]: Finished difference Result 276 states and 586 transitions. [2021-06-05 21:57:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:57:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:24,209 INFO L225 Difference]: With dead ends: 276 [2021-06-05 21:57:24,209 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 21:57:24,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1430.7ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:57:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 21:57:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2021-06-05 21:57:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.220779220779221) internal successors, (513), 231 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 513 transitions. [2021-06-05 21:57:24,211 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 513 transitions. Word has length 20 [2021-06-05 21:57:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:24,212 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 513 transitions. [2021-06-05 21:57:24,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 513 transitions. [2021-06-05 21:57:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:24,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:24,212 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:24,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:24,412 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1861998317, now seen corresponding path program 527 times [2021-06-05 21:57:24,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:24,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137268773] [2021-06-05 21:57:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:24,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137268773] [2021-06-05 21:57:24,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137268773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443425068] [2021-06-05 21:57:24,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:24,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:24,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:24,926 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:25,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443425068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:25,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:25,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:25,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907421898] [2021-06-05 21:57:25,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:25,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:25,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:25,046 INFO L87 Difference]: Start difference. First operand 232 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:25,606 INFO L93 Difference]: Finished difference Result 285 states and 598 transitions. [2021-06-05 21:57:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:25,607 INFO L225 Difference]: With dead ends: 285 [2021-06-05 21:57:25,607 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 21:57:25,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:57:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 21:57:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2021-06-05 21:57:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.217948717948718) internal successors, (519), 234 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 519 transitions. [2021-06-05 21:57:25,609 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 519 transitions. Word has length 20 [2021-06-05 21:57:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:25,609 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 519 transitions. [2021-06-05 21:57:25,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 519 transitions. [2021-06-05 21:57:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:25,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:25,609 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:25,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-06-05 21:57:25,809 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:25,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1895113401, now seen corresponding path program 528 times [2021-06-05 21:57:25,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:25,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458237325] [2021-06-05 21:57:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:25,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:25,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458237325] [2021-06-05 21:57:25,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458237325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:25,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973425802] [2021-06-05 21:57:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:26,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:57:26,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:26,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973425802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:26,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:26,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:26,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350037777] [2021-06-05 21:57:26,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:26,407 INFO L87 Difference]: Start difference. First operand 235 states and 519 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:27,163 INFO L93 Difference]: Finished difference Result 312 states and 656 transitions. [2021-06-05 21:57:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:57:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:27,163 INFO L225 Difference]: With dead ends: 312 [2021-06-05 21:57:27,163 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 21:57:27,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 968.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:57:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 21:57:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 236. [2021-06-05 21:57:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.2212765957446807) internal successors, (522), 235 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 522 transitions. [2021-06-05 21:57:27,165 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 522 transitions. Word has length 20 [2021-06-05 21:57:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:27,166 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 522 transitions. [2021-06-05 21:57:27,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 522 transitions. [2021-06-05 21:57:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:27,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:27,166 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:27,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:27,366 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:27,367 INFO L82 PathProgramCache]: Analyzing trace with hash -384757289, now seen corresponding path program 529 times [2021-06-05 21:57:27,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:27,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612929982] [2021-06-05 21:57:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:27,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612929982] [2021-06-05 21:57:27,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612929982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842569774] [2021-06-05 21:57:27,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:28,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842569774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:28,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:28,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:28,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787173905] [2021-06-05 21:57:28,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:28,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:28,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:28,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:28,037 INFO L87 Difference]: Start difference. First operand 236 states and 522 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:28,847 INFO L93 Difference]: Finished difference Result 282 states and 600 transitions. [2021-06-05 21:57:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:57:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:28,847 INFO L225 Difference]: With dead ends: 282 [2021-06-05 21:57:28,847 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 21:57:28,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1070.1ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:57:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 21:57:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-06-05 21:57:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-06-05 21:57:28,850 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-06-05 21:57:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:28,850 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-06-05 21:57:28,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-06-05 21:57:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:28,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:28,850 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:29,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4021,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:29,050 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash 411978463, now seen corresponding path program 530 times [2021-06-05 21:57:29,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:29,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196834902] [2021-06-05 21:57:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:29,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196834902] [2021-06-05 21:57:29,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196834902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:29,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994187062] [2021-06-05 21:57:29,227 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 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:29,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994187062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:29,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:29,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:29,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322647982] [2021-06-05 21:57:29,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:29,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:29,646 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:30,263 INFO L93 Difference]: Finished difference Result 304 states and 642 transitions. [2021-06-05 21:57:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:30,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:30,264 INFO L225 Difference]: With dead ends: 304 [2021-06-05 21:57:30,264 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 21:57:30,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:57:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 21:57:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 238. [2021-06-05 21:57:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-06-05 21:57:30,266 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-06-05 21:57:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:30,266 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-06-05 21:57:30,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-06-05 21:57:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:30,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:30,267 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:30,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:30,467 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash 918324729, now seen corresponding path program 531 times [2021-06-05 21:57:30,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:30,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140840932] [2021-06-05 21:57:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140840932] [2021-06-05 21:57:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140840932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736008233] [2021-06-05 21:57:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:30,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:57:30,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:30,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 21:57:30,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:31,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736008233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:31,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:31,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:31,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559293371] [2021-06-05 21:57:31,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:31,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:31,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:31,145 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:32,026 INFO L93 Difference]: Finished difference Result 322 states and 659 transitions. [2021-06-05 21:57:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:32,027 INFO L225 Difference]: With dead ends: 322 [2021-06-05 21:57:32,027 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 21:57:32,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1170.0ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:57:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 21:57:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 239. [2021-06-05 21:57:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.2184873949579833) internal successors, (528), 238 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 528 transitions. [2021-06-05 21:57:32,029 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 528 transitions. Word has length 20 [2021-06-05 21:57:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:32,029 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 528 transitions. [2021-06-05 21:57:32,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 528 transitions. [2021-06-05 21:57:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:32,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:32,029 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:32,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:32,229 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash -958444701, now seen corresponding path program 532 times [2021-06-05 21:57:32,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:32,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756572071] [2021-06-05 21:57:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:32,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756572071] [2021-06-05 21:57:32,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756572071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:32,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655428165] [2021-06-05 21:57:32,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:32,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655428165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:32,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:32,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:32,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428670984] [2021-06-05 21:57:32,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:32,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:32,909 INFO L87 Difference]: Start difference. First operand 239 states and 528 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:33,839 INFO L93 Difference]: Finished difference Result 268 states and 583 transitions. [2021-06-05 21:57:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:33,840 INFO L225 Difference]: With dead ends: 268 [2021-06-05 21:57:33,840 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 21:57:33,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1172.3ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:57:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 21:57:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 240. [2021-06-05 21:57:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-06-05 21:57:33,842 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-06-05 21:57:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:33,842 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-06-05 21:57:33,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-06-05 21:57:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:33,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:33,842 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:34,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-06-05 21:57:34,042 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash -660391743, now seen corresponding path program 533 times [2021-06-05 21:57:34,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:34,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497415899] [2021-06-05 21:57:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:34,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:34,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497415899] [2021-06-05 21:57:34,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497415899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:34,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739054256] [2021-06-05 21:57:34,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:34,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:57:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:34,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739054256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:34,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:34,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:34,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129277997] [2021-06-05 21:57:34,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:34,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:34,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:34,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:34,836 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:35,429 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-06-05 21:57:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:35,429 INFO L225 Difference]: With dead ends: 259 [2021-06-05 21:57:35,429 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:57:35,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1033.6ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:57:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:57:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-06-05 21:57:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-05 21:57:35,431 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-05 21:57:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:35,431 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-05 21:57:35,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-05 21:57:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:35,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:35,432 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:35,632 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1981622179, now seen corresponding path program 534 times [2021-06-05 21:57:35,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:35,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242425568] [2021-06-05 21:57:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:35,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242425568] [2021-06-05 21:57:35,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242425568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:35,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105746158] [2021-06-05 21:57:35,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:35,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:57:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105746158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:36,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:36,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:36,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300372365] [2021-06-05 21:57:36,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:36,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:36,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:36,473 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:37,211 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-06-05 21:57:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:37,212 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:57:37,212 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:57:37,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1201.9ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:57:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:57:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-06-05 21:57:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-05 21:57:37,214 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-05 21:57:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,214 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-05 21:57:37,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-05 21:57:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:37,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,214 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-06-05 21:57:37,414 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash 404280449, now seen corresponding path program 535 times [2021-06-05 21:57:37,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664641842] [2021-06-05 21:57:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664641842] [2021-06-05 21:57:37,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664641842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:37,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803594403] [2021-06-05 21:57:37,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:37,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803594403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:38,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:38,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:38,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962674335] [2021-06-05 21:57:38,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:38,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:38,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:38,236 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,724 INFO L93 Difference]: Finished difference Result 283 states and 603 transitions. [2021-06-05 21:57:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:57:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,725 INFO L225 Difference]: With dead ends: 283 [2021-06-05 21:57:39,725 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 21:57:39,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1752.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:57:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 21:57:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 241. [2021-06-05 21:57:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-05 21:57:39,727 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-05 21:57:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,727 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-05 21:57:39,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-05 21:57:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:39,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,728 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-06-05 21:57:39,928 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,928 INFO L82 PathProgramCache]: Analyzing trace with hash 607065435, now seen corresponding path program 536 times [2021-06-05 21:57:39,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890301489] [2021-06-05 21:57:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:40,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:40,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890301489] [2021-06-05 21:57:40,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890301489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:40,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84203050] [2021-06-05 21:57:40,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:40,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:40,428 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:40,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84203050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:40,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:40,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46271552] [2021-06-05 21:57:40,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:40,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:40,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:40,633 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,144 INFO L93 Difference]: Finished difference Result 260 states and 560 transitions. [2021-06-05 21:57:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:41,145 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,145 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:57:41,145 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:57:41,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 909.1ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:57:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:57:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-06-05 21:57:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-05 21:57:41,147 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-05 21:57:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,147 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-05 21:57:41,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-05 21:57:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:41,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,147 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-05 21:57:41,348 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1045887939, now seen corresponding path program 537 times [2021-06-05 21:57:41,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056395406] [2021-06-05 21:57:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056395406] [2021-06-05 21:57:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056395406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052939003] [2021-06-05 21:57:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:41,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:57:41,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:41,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:41,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:42,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052939003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:42,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:42,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:42,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916730562] [2021-06-05 21:57:42,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:42,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:42,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:42,005 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:43,313 INFO L93 Difference]: Finished difference Result 297 states and 622 transitions. [2021-06-05 21:57:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:43,314 INFO L225 Difference]: With dead ends: 297 [2021-06-05 21:57:43,314 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 21:57:43,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1477.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:57:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 21:57:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2021-06-05 21:57:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.21900826446281) internal successors, (537), 242 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 537 transitions. [2021-06-05 21:57:43,316 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 537 transitions. Word has length 20 [2021-06-05 21:57:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:43,316 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 537 transitions. [2021-06-05 21:57:43,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 537 transitions. [2021-06-05 21:57:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:43,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:43,316 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:43,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:43,517 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:43,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1671737627, now seen corresponding path program 538 times [2021-06-05 21:57:43,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:43,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635327839] [2021-06-05 21:57:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:43,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635327839] [2021-06-05 21:57:43,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635327839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:43,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504139101] [2021-06-05 21:57:43,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:43,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:44,102 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:44,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504139101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:44,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:44,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:44,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446202058] [2021-06-05 21:57:44,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:44,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:44,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:44,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:44,351 INFO L87 Difference]: Start difference. First operand 243 states and 537 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:45,395 INFO L93 Difference]: Finished difference Result 290 states and 611 transitions. [2021-06-05 21:57:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:57:45,395 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:45,396 INFO L225 Difference]: With dead ends: 290 [2021-06-05 21:57:45,396 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 21:57:45,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1398.6ms TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:57:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 21:57:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 242. [2021-06-05 21:57:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-05 21:57:45,398 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-05 21:57:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:45,398 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-05 21:57:45,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-05 21:57:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:45,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:45,398 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:45,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:45,599 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1765944419, now seen corresponding path program 539 times [2021-06-05 21:57:45,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:45,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68469311] [2021-06-05 21:57:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:45,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:45,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68469311] [2021-06-05 21:57:45,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68469311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:45,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762645237] [2021-06-05 21:57:45,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:45,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:45,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:45,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:45,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:46,165 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:46,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762645237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:46,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:46,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:46,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379578086] [2021-06-05 21:57:46,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:46,326 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:46,842 INFO L93 Difference]: Finished difference Result 259 states and 559 transitions. [2021-06-05 21:57:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:46,842 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:46,842 INFO L225 Difference]: With dead ends: 259 [2021-06-05 21:57:46,842 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 21:57:46,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 911.6ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:57:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 21:57:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-06-05 21:57:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.2148760330578514) internal successors, (536), 242 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 536 transitions. [2021-06-05 21:57:46,844 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 536 transitions. Word has length 20 [2021-06-05 21:57:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:46,844 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 536 transitions. [2021-06-05 21:57:46,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 536 transitions. [2021-06-05 21:57:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:46,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:46,845 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:47,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:47,045 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 188602689, now seen corresponding path program 540 times [2021-06-05 21:57:47,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:47,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099736265] [2021-06-05 21:57:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099736265] [2021-06-05 21:57:47,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099736265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:47,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147670503] [2021-06-05 21:57:47,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:47,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:47,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:47,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:47,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147670503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:47,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:47,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:47,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337960960] [2021-06-05 21:57:47,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:47,760 INFO L87 Difference]: Start difference. First operand 243 states and 536 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:49,055 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-06-05 21:57:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:49,056 INFO L225 Difference]: With dead ends: 284 [2021-06-05 21:57:49,056 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 21:57:49,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1498.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:57:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 21:57:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2021-06-05 21:57:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-05 21:57:49,058 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-05 21:57:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:49,058 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-05 21:57:49,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-05 21:57:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:49,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:49,058 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:49,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-06-05 21:57:49,259 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash 694948955, now seen corresponding path program 541 times [2021-06-05 21:57:49,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:49,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009771740] [2021-06-05 21:57:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:49,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009771740] [2021-06-05 21:57:49,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009771740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264282707] [2021-06-05 21:57:49,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:49,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264282707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:49,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:57:49,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129383844] [2021-06-05 21:57:49,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:57:49,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:49,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:57:49,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:49,929 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:50,737 INFO L93 Difference]: Finished difference Result 283 states and 601 transitions. [2021-06-05 21:57:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:50,737 INFO L225 Difference]: With dead ends: 283 [2021-06-05 21:57:50,737 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 21:57:50,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:57:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 21:57:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 240. [2021-06-05 21:57:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-06-05 21:57:50,739 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-06-05 21:57:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:50,740 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-06-05 21:57:50,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-06-05 21:57:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:50,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:50,740 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:50,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-06-05 21:57:50,940 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:50,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1243532289, now seen corresponding path program 542 times [2021-06-05 21:57:50,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:50,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543666971] [2021-06-05 21:57:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543666971] [2021-06-05 21:57:51,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543666971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30693204] [2021-06-05 21:57:51,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:51,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:57:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:51,479 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30693204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:51,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:51,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:51,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689859246] [2021-06-05 21:57:51,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:51,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:51,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:51,686 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:52,080 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-06-05 21:57:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:52,081 INFO L225 Difference]: With dead ends: 259 [2021-06-05 21:57:52,081 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:57:52,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:57:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:57:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-06-05 21:57:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-05 21:57:52,083 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-05 21:57:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:52,083 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-05 21:57:52,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-05 21:57:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:52,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:52,083 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:52,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-05 21:57:52,284 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash -409421085, now seen corresponding path program 543 times [2021-06-05 21:57:52,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:52,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260653574] [2021-06-05 21:57:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:52,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260653574] [2021-06-05 21:57:52,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260653574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:52,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417702636] [2021-06-05 21:57:52,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:52,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:57:52,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 21:57:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417702636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:52,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:52,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:52,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012327378] [2021-06-05 21:57:52,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:52,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:52,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:52,936 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:53,434 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-06-05 21:57:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:53,434 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:57:53,434 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:57:53,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:57:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:57:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-06-05 21:57:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-05 21:57:53,436 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-05 21:57:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:53,436 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-05 21:57:53,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-05 21:57:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:53,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:53,437 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:53,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4200 [2021-06-05 21:57:53,637 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1986762815, now seen corresponding path program 544 times [2021-06-05 21:57:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:53,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924585928] [2021-06-05 21:57:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:53,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:53,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924585928] [2021-06-05 21:57:53,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924585928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:53,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010974383] [2021-06-05 21:57:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:53,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:53,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:53,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:54,141 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:57:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010974383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:54,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:54,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:54,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108610547] [2021-06-05 21:57:54,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:54,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:54,373 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:55,909 INFO L93 Difference]: Finished difference Result 317 states and 664 transitions. [2021-06-05 21:57:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:57:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:55,909 INFO L225 Difference]: With dead ends: 317 [2021-06-05 21:57:55,909 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 21:57:55,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1859.8ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:57:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 21:57:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 240. [2021-06-05 21:57:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-06-05 21:57:55,911 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-06-05 21:57:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:55,911 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-06-05 21:57:55,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-06-05 21:57:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:55,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:55,912 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:56,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4214 [2021-06-05 21:57:56,112 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:56,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:56,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1288305703, now seen corresponding path program 545 times [2021-06-05 21:57:56,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:56,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388977806] [2021-06-05 21:57:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:56,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388977806] [2021-06-05 21:57:56,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388977806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:56,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592516783] [2021-06-05 21:57:56,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:56,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:57:56,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592516783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:56,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:56,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:56,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295125377] [2021-06-05 21:57:56,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:56,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:56,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:56,675 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,503 INFO L93 Difference]: Finished difference Result 297 states and 623 transitions. [2021-06-05 21:57:57,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:57,503 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,503 INFO L225 Difference]: With dead ends: 297 [2021-06-05 21:57:57,503 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 21:57:57,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 895.1ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:57:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 21:57:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 237. [2021-06-05 21:57:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.2161016949152543) internal successors, (523), 236 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 523 transitions. [2021-06-05 21:57:57,505 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 523 transitions. Word has length 20 [2021-06-05 21:57:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,506 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 523 transitions. [2021-06-05 21:57:57,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,506 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 523 transitions. [2021-06-05 21:57:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:57,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,506 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4226,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:57,709 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -625098845, now seen corresponding path program 546 times [2021-06-05 21:57:57,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770617849] [2021-06-05 21:57:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770617849] [2021-06-05 21:57:57,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770617849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:57,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432283700] [2021-06-05 21:57:57,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:57,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 21:57:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432283700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:58,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:58,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:58,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997227660] [2021-06-05 21:57:58,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:58,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:58,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:58,353 INFO L87 Difference]: Start difference. First operand 237 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,955 INFO L93 Difference]: Finished difference Result 281 states and 589 transitions. [2021-06-05 21:57:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:57:58,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:57:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,955 INFO L225 Difference]: With dead ends: 281 [2021-06-05 21:57:58,955 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:57:58,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:57:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:57:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2021-06-05 21:57:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-05 21:57:58,957 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-05 21:57:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,958 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-05 21:57:58,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-05 21:57:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:57:58,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,958 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4238,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:59,169 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2092526721, now seen corresponding path program 547 times [2021-06-05 21:57:59,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4999509] [2021-06-05 21:57:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4999509] [2021-06-05 21:57:59,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4999509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806384782] [2021-06-05 21:57:59,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:57:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:59,813 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:57:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806384782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:59,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:59,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:57:59,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110811353] [2021-06-05 21:57:59,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:57:59,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:57:59,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:59,990 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,869 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 21:58:01,191 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-05 21:58:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,799 INFO L93 Difference]: Finished difference Result 309 states and 648 transitions. [2021-06-05 21:58:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:58:01,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,800 INFO L225 Difference]: With dead ends: 309 [2021-06-05 21:58:01,800 INFO L226 Difference]: Without dead ends: 291 [2021-06-05 21:58:01,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2106.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:58:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-05 21:58:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 244. [2021-06-05 21:58:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.2263374485596708) internal successors, (541), 243 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 541 transitions. [2021-06-05 21:58:01,802 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 541 transitions. Word has length 20 [2021-06-05 21:58:01,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,802 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 541 transitions. [2021-06-05 21:58:01,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 541 transitions. [2021-06-05 21:58:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:01,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,803 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:02,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4252 [2021-06-05 21:58:02,003 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash -361502979, now seen corresponding path program 548 times [2021-06-05 21:58:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:02,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066152526] [2021-06-05 21:58:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:02,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066152526] [2021-06-05 21:58:02,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066152526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:02,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193085503] [2021-06-05 21:58:02,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:02,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:02,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:02,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:02,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:02,560 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193085503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:02,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:02,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:02,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210824829] [2021-06-05 21:58:02,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:02,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:02,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:02,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:02,675 INFO L87 Difference]: Start difference. First operand 244 states and 541 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:03,874 INFO L93 Difference]: Finished difference Result 315 states and 660 transitions. [2021-06-05 21:58:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:58:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:03,874 INFO L225 Difference]: With dead ends: 315 [2021-06-05 21:58:03,875 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 21:58:03,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1374.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:58:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 21:58:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2021-06-05 21:58:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.227642276422764) internal successors, (548), 246 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 548 transitions. [2021-06-05 21:58:03,877 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 548 transitions. Word has length 20 [2021-06-05 21:58:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:03,877 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 548 transitions. [2021-06-05 21:58:03,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 548 transitions. [2021-06-05 21:58:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:03,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:03,877 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4264,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:04,078 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1115738049, now seen corresponding path program 549 times [2021-06-05 21:58:04,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403653576] [2021-06-05 21:58:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403653576] [2021-06-05 21:58:04,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403653576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:04,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010872418] [2021-06-05 21:58:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:04,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 21:58:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010872418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:04,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:04,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:04,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525354728] [2021-06-05 21:58:04,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:04,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:04,709 INFO L87 Difference]: Start difference. First operand 247 states and 548 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,464 INFO L93 Difference]: Finished difference Result 296 states and 631 transitions. [2021-06-05 21:58:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:58:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,464 INFO L225 Difference]: With dead ends: 296 [2021-06-05 21:58:05,464 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 21:58:05,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 955.6ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:58:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 21:58:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2021-06-05 21:58:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.224) internal successors, (556), 250 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 556 transitions. [2021-06-05 21:58:05,467 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 556 transitions. Word has length 20 [2021-06-05 21:58:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,467 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 556 transitions. [2021-06-05 21:58:05,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 556 transitions. [2021-06-05 21:58:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:05,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,467 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4277 [2021-06-05 21:58:05,667 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1912473801, now seen corresponding path program 550 times [2021-06-05 21:58:05,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245954489] [2021-06-05 21:58:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245954489] [2021-06-05 21:58:05,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245954489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:05,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845490617] [2021-06-05 21:58:05,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:05,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:06,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845490617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:06,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:06,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:06,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106167468] [2021-06-05 21:58:06,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:06,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:06,219 INFO L87 Difference]: Start difference. First operand 251 states and 556 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:07,900 INFO L93 Difference]: Finished difference Result 357 states and 733 transitions. [2021-06-05 21:58:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:58:07,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:07,901 INFO L225 Difference]: With dead ends: 357 [2021-06-05 21:58:07,901 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 21:58:07,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1725.3ms TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:58:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 21:58:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 254. [2021-06-05 21:58:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.225296442687747) internal successors, (563), 253 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 563 transitions. [2021-06-05 21:58:07,903 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 563 transitions. Word has length 20 [2021-06-05 21:58:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:07,903 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 563 transitions. [2021-06-05 21:58:07,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 563 transitions. [2021-06-05 21:58:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:07,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:07,904 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:08,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4291,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:08,104 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:08,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1876147229, now seen corresponding path program 551 times [2021-06-05 21:58:08,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:08,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450986366] [2021-06-05 21:58:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:08,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:08,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450986366] [2021-06-05 21:58:08,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450986366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:08,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663908634] [2021-06-05 21:58:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:08,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:58:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:08,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:08,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:08,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663908634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:08,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:08,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:08,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751131364] [2021-06-05 21:58:08,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:08,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:08,763 INFO L87 Difference]: Start difference. First operand 254 states and 563 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:09,741 INFO L93 Difference]: Finished difference Result 332 states and 704 transitions. [2021-06-05 21:58:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:58:09,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:09,742 INFO L225 Difference]: With dead ends: 332 [2021-06-05 21:58:09,742 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 21:58:09,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1132.3ms TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:58:09,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 21:58:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 256. [2021-06-05 21:58:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-05 21:58:09,744 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-05 21:58:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:09,744 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-05 21:58:09,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-05 21:58:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:09,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:09,744 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:09,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:09,945 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -500831717, now seen corresponding path program 552 times [2021-06-05 21:58:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:09,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641529276] [2021-06-05 21:58:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:10,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:10,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641529276] [2021-06-05 21:58:10,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641529276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:10,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887752279] [2021-06-05 21:58:10,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:10,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:58:10,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:10,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:10,484 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:58:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:10,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887752279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:10,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:10,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:10,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038638305] [2021-06-05 21:58:10,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:10,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:10,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:10,689 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:11,075 INFO L93 Difference]: Finished difference Result 275 states and 597 transitions. [2021-06-05 21:58:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:11,075 INFO L225 Difference]: With dead ends: 275 [2021-06-05 21:58:11,075 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 21:58:11,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 21:58:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-06-05 21:58:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.23046875) internal successors, (571), 256 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 571 transitions. [2021-06-05 21:58:11,077 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 571 transitions. Word has length 20 [2021-06-05 21:58:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:11,077 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 571 transitions. [2021-06-05 21:58:11,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 571 transitions. [2021-06-05 21:58:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:11,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:11,078 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:11,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4317,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:11,278 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2141182205, now seen corresponding path program 553 times [2021-06-05 21:58:11,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:11,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577768417] [2021-06-05 21:58:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:11,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:11,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577768417] [2021-06-05 21:58:11,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577768417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:11,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44112413] [2021-06-05 21:58:11,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:11,842 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:58:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:12,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44112413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:12,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:12,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:12,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466868167] [2021-06-05 21:58:12,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:12,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:12,060 INFO L87 Difference]: Start difference. First operand 257 states and 571 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:12,524 INFO L93 Difference]: Finished difference Result 274 states and 596 transitions. [2021-06-05 21:58:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:12,524 INFO L225 Difference]: With dead ends: 274 [2021-06-05 21:58:12,525 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 21:58:12,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 880.7ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 21:58:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2021-06-05 21:58:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2295719844357977) internal successors, (573), 257 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 573 transitions. [2021-06-05 21:58:12,527 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 573 transitions. Word has length 20 [2021-06-05 21:58:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:12,527 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 573 transitions. [2021-06-05 21:58:12,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 573 transitions. [2021-06-05 21:58:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:12,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:12,527 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:12,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-06-05 21:58:12,727 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:12,727 INFO L82 PathProgramCache]: Analyzing trace with hash 563840475, now seen corresponding path program 554 times [2021-06-05 21:58:12,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:12,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703164404] [2021-06-05 21:58:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:13,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:13,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703164404] [2021-06-05 21:58:13,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703164404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:13,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737190944] [2021-06-05 21:58:13,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:13,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:13,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:13,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:13,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737190944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:13,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:13,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:13,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888344915] [2021-06-05 21:58:13,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:13,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:13,560 INFO L87 Difference]: Start difference. First operand 258 states and 573 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:14,308 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-06-05 21:58:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:58:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:14,309 INFO L225 Difference]: With dead ends: 299 [2021-06-05 21:58:14,309 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 21:58:14,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1196.0ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:58:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 21:58:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 256. [2021-06-05 21:58:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-05 21:58:14,311 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-05 21:58:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:14,311 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-05 21:58:14,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-05 21:58:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:14,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:14,311 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:14,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4341,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:14,511 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash 658047267, now seen corresponding path program 555 times [2021-06-05 21:58:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:14,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697781881] [2021-06-05 21:58:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:14,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:14,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697781881] [2021-06-05 21:58:14,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697781881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:14,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333076805] [2021-06-05 21:58:14,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:14,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:14,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:15,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333076805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:15,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:15,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:15,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245975874] [2021-06-05 21:58:15,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:15,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:15,200 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:15,765 INFO L93 Difference]: Finished difference Result 284 states and 611 transitions. [2021-06-05 21:58:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:58:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:15,766 INFO L225 Difference]: With dead ends: 284 [2021-06-05 21:58:15,766 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 21:58:15,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 893.4ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:58:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 21:58:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 257. [2021-06-05 21:58:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.234375) internal successors, (572), 256 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 572 transitions. [2021-06-05 21:58:15,768 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 572 transitions. Word has length 20 [2021-06-05 21:58:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:15,768 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 572 transitions. [2021-06-05 21:58:15,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 572 transitions. [2021-06-05 21:58:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:15,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:15,768 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:15,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-06-05 21:58:15,969 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash -919294463, now seen corresponding path program 556 times [2021-06-05 21:58:15,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:15,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449635294] [2021-06-05 21:58:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:16,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:16,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449635294] [2021-06-05 21:58:16,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449635294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:16,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107394976] [2021-06-05 21:58:16,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:16,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:16,546 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:16,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107394976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:16,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:16,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:16,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869261445] [2021-06-05 21:58:16,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:16,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:16,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:16,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:16,726 INFO L87 Difference]: Start difference. First operand 257 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:17,780 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 21:58:17,944 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-05 21:58:18,117 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 21:58:18,515 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 21:58:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:18,550 INFO L93 Difference]: Finished difference Result 322 states and 680 transitions. [2021-06-05 21:58:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:58:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:18,550 INFO L225 Difference]: With dead ends: 322 [2021-06-05 21:58:18,550 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 21:58:18,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2098.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:58:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 21:58:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2021-06-05 21:58:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-05 21:58:18,552 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-05 21:58:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:18,552 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-05 21:58:18,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-05 21:58:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:18,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:18,553 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:18,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:18,753 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -412948197, now seen corresponding path program 557 times [2021-06-05 21:58:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87462523] [2021-06-05 21:58:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:19,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:19,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87462523] [2021-06-05 21:58:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87462523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:19,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142936247] [2021-06-05 21:58:19,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:19,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:58:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:19,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:19,371 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142936247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:19,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:19,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213525454] [2021-06-05 21:58:19,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:19,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:19,494 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:20,400 INFO L93 Difference]: Finished difference Result 318 states and 667 transitions. [2021-06-05 21:58:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:58:20,401 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:20,401 INFO L225 Difference]: With dead ends: 318 [2021-06-05 21:58:20,401 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 21:58:20,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1238.2ms TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:58:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 21:58:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2021-06-05 21:58:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-05 21:58:20,403 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-05 21:58:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:20,403 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-05 21:58:20,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-05 21:58:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:20,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:20,404 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:20,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4380,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:20,604 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1753934048, now seen corresponding path program 558 times [2021-06-05 21:58:20,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:20,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205746713] [2021-06-05 21:58:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:20,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:20,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205746713] [2021-06-05 21:58:20,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205746713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:20,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795279371] [2021-06-05 21:58:20,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:20,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:58:20,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:58:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:21,100 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:58:21,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 21:58:21,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,112 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:58:21,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 21:58:21,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,121 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 21:58:21,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,129 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,139 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:58:21,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 21:58:21,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,155 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,168 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,175 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,176 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,183 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,183 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,189 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,196 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,196 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,202 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,209 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,209 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,218 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,223 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:58:21,229 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,235 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,236 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,243 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,243 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,250 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,251 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,259 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,265 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,266 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,272 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,273 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 21:58:21,278 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,286 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,300 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,305 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,310 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,317 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,318 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,322 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,329 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,330 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,335 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,336 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,340 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 21:58:21,344 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,350 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,351 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,357 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,358 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,365 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,368 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,372 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,376 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,380 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,386 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,392 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,393 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,399 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,405 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,408 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,414 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 21:58:21,415 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,419 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,424 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 21:58:21,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 21:58:21,430 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,433 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 21:58:21,438 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:21,440 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,506 INFO L628 ElimStorePlain]: treesize reduction 117, result has 34.6 percent of original size [2021-06-05 21:58:21,507 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-06-05 21:58:21,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:58:21,508 INFO L247 ElimStorePlain]: Needed 55 recursive calls to eliminate 3 variables, input treesize:2437, output treesize:44 [2021-06-05 21:58:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795279371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:21,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:21,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 21:58:21,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068942222] [2021-06-05 21:58:21,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:58:21,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:58:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:58:21,598 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:22,717 INFO L93 Difference]: Finished difference Result 367 states and 764 transitions. [2021-06-05 21:58:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:58:22,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:22,718 INFO L225 Difference]: With dead ends: 367 [2021-06-05 21:58:22,718 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 21:58:22,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1181.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:58:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 21:58:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 281. [2021-06-05 21:58:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-05 21:58:22,720 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-05 21:58:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:22,720 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-05 21:58:22,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-05 21:58:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:22,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:22,721 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:22,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4392 [2021-06-05 21:58:22,921 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1878238050, now seen corresponding path program 559 times [2021-06-05 21:58:22,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:22,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724356845] [2021-06-05 21:58:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:23,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:23,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724356845] [2021-06-05 21:58:23,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724356845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:23,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156484931] [2021-06-05 21:58:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:23,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156484931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:23,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:23,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:58:23,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206308856] [2021-06-05 21:58:23,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:58:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:58:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:58:23,223 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:23,605 INFO L93 Difference]: Finished difference Result 319 states and 697 transitions. [2021-06-05 21:58:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:58:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:23,606 INFO L225 Difference]: With dead ends: 319 [2021-06-05 21:58:23,606 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 21:58:23,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 21:58:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 281. [2021-06-05 21:58:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2357142857142858) internal successors, (626), 280 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 626 transitions. [2021-06-05 21:58:23,608 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 626 transitions. Word has length 20 [2021-06-05 21:58:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:23,608 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 626 transitions. [2021-06-05 21:58:23,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 626 transitions. [2021-06-05 21:58:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:23,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:23,609 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:23,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-06-05 21:58:23,809 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash 383787555, now seen corresponding path program 560 times [2021-06-05 21:58:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:23,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946954409] [2021-06-05 21:58:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:23,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946954409] [2021-06-05 21:58:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946954409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279475909] [2021-06-05 21:58:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:24,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:24,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:24,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279475909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:24,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:24,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:24,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174472269] [2021-06-05 21:58:24,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:24,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:24,416 INFO L87 Difference]: Start difference. First operand 281 states and 626 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:24,967 INFO L93 Difference]: Finished difference Result 333 states and 719 transitions. [2021-06-05 21:58:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:58:24,967 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:24,968 INFO L225 Difference]: With dead ends: 333 [2021-06-05 21:58:24,968 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 21:58:24,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:58:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 21:58:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-06-05 21:58:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-06-05 21:58:24,970 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-06-05 21:58:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:24,970 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-06-05 21:58:24,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-06-05 21:58:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:24,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:24,970 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:25,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4458,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:25,171 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1682754045, now seen corresponding path program 561 times [2021-06-05 21:58:25,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:25,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326583094] [2021-06-05 21:58:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:25,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:25,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326583094] [2021-06-05 21:58:25,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326583094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:25,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225798441] [2021-06-05 21:58:25,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:25,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:25,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:25,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:25,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:25,672 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:25,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225798441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:25,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:25,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:25,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372396879] [2021-06-05 21:58:25,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:25,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:25,843 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:26,646 INFO L93 Difference]: Finished difference Result 338 states and 718 transitions. [2021-06-05 21:58:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:58:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:26,646 INFO L225 Difference]: With dead ends: 338 [2021-06-05 21:58:26,646 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 21:58:26,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1082.0ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:58:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 21:58:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 285. [2021-06-05 21:58:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-06-05 21:58:26,649 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-06-05 21:58:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:26,649 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-06-05 21:58:26,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-06-05 21:58:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:26,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:26,649 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:26,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-06-05 21:58:26,849 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash 854508981, now seen corresponding path program 562 times [2021-06-05 21:58:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:26,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036125431] [2021-06-05 21:58:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:27,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036125431] [2021-06-05 21:58:27,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036125431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827318319] [2021-06-05 21:58:27,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:27,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:27,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:27,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:27,383 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:27,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827318319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:27,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:27,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700623975] [2021-06-05 21:58:27,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:27,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:27,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:27,506 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:28,270 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2021-06-05 21:58:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:58:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:28,271 INFO L225 Difference]: With dead ends: 330 [2021-06-05 21:58:28,271 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 21:58:28,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1044.0ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:58:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 21:58:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-06-05 21:58:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-06-05 21:58:28,273 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-06-05 21:58:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:28,274 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-06-05 21:58:28,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-06-05 21:58:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:28,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:28,274 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:28,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4483 [2021-06-05 21:58:28,474 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1651244733, now seen corresponding path program 563 times [2021-06-05 21:58:28,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:28,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2949524] [2021-06-05 21:58:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:28,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:28,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2949524] [2021-06-05 21:58:28,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2949524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:28,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470217777] [2021-06-05 21:58:28,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:28,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:58:28,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:28,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:29,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470217777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:29,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:29,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:29,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078849095] [2021-06-05 21:58:29,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:29,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:29,015 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:29,683 INFO L93 Difference]: Finished difference Result 347 states and 744 transitions. [2021-06-05 21:58:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:58:29,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:29,684 INFO L225 Difference]: With dead ends: 347 [2021-06-05 21:58:29,684 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 21:58:29,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:58:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 21:58:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 285. [2021-06-05 21:58:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-06-05 21:58:29,686 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-06-05 21:58:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:29,686 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-06-05 21:58:29,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-06-05 21:58:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:29,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:29,687 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:29,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4495 [2021-06-05 21:58:29,887 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:29,887 INFO L82 PathProgramCache]: Analyzing trace with hash 705965373, now seen corresponding path program 564 times [2021-06-05 21:58:29,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:29,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932035076] [2021-06-05 21:58:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:30,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:30,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932035076] [2021-06-05 21:58:30,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932035076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:30,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872384080] [2021-06-05 21:58:30,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:30,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:58:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:30,438 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:30,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872384080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:30,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:30,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:30,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284037441] [2021-06-05 21:58:30,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:30,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:30,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:30,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:30,556 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:31,977 INFO L93 Difference]: Finished difference Result 373 states and 780 transitions. [2021-06-05 21:58:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:58:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:31,978 INFO L225 Difference]: With dead ends: 373 [2021-06-05 21:58:31,978 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 21:58:31,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1647.8ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:58:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 21:58:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 284. [2021-06-05 21:58:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-06-05 21:58:31,980 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-06-05 21:58:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:31,980 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-06-05 21:58:31,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-06-05 21:58:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:31,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:31,981 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:32,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4507,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:32,181 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash -671736063, now seen corresponding path program 565 times [2021-06-05 21:58:32,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:32,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117153750] [2021-06-05 21:58:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:32,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:32,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117153750] [2021-06-05 21:58:32,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117153750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:32,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984244889] [2021-06-05 21:58:32,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:32,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984244889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:32,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:32,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799599697] [2021-06-05 21:58:32,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:32,777 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:33,808 INFO L93 Difference]: Finished difference Result 342 states and 726 transitions. [2021-06-05 21:58:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:58:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:33,809 INFO L225 Difference]: With dead ends: 342 [2021-06-05 21:58:33,809 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 21:58:33,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1225.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:58:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 21:58:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 285. [2021-06-05 21:58:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2359154929577465) internal successors, (635), 284 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 635 transitions. [2021-06-05 21:58:33,811 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 635 transitions. Word has length 20 [2021-06-05 21:58:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:33,811 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 635 transitions. [2021-06-05 21:58:33,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 635 transitions. [2021-06-05 21:58:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:33,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:33,812 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:34,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4520,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:34,012 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:34,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:34,012 INFO L82 PathProgramCache]: Analyzing trace with hash -165389797, now seen corresponding path program 566 times [2021-06-05 21:58:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:34,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785252441] [2021-06-05 21:58:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:34,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:34,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785252441] [2021-06-05 21:58:34,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785252441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:34,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85821471] [2021-06-05 21:58:34,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:34,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:34,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:34,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:34,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:34,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85821471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:34,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:34,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:34,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112015609] [2021-06-05 21:58:34,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:34,628 INFO L87 Difference]: Start difference. First operand 285 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:35,725 INFO L93 Difference]: Finished difference Result 351 states and 744 transitions. [2021-06-05 21:58:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:58:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:35,725 INFO L225 Difference]: With dead ends: 351 [2021-06-05 21:58:35,725 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 21:58:35,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1280.5ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:58:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 21:58:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 285. [2021-06-05 21:58:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-06-05 21:58:35,728 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-06-05 21:58:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:35,728 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-06-05 21:58:35,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-06-05 21:58:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:35,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:35,728 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:35,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:35,944 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:35,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1732995997, now seen corresponding path program 567 times [2021-06-05 21:58:35,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:35,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289752392] [2021-06-05 21:58:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:36,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289752392] [2021-06-05 21:58:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289752392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439206195] [2021-06-05 21:58:36,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:36,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:36,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:36,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:36,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:36,455 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439206195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:36,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:36,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:36,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229777984] [2021-06-05 21:58:36,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:36,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:36,613 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:37,184 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-06-05 21:58:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:58:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:37,185 INFO L225 Difference]: With dead ends: 308 [2021-06-05 21:58:37,185 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 21:58:37,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 888.2ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:58:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 21:58:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2021-06-05 21:58:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.231578947368421) internal successors, (636), 285 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 636 transitions. [2021-06-05 21:58:37,187 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 636 transitions. Word has length 20 [2021-06-05 21:58:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:37,187 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 636 transitions. [2021-06-05 21:58:37,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 636 transitions. [2021-06-05 21:58:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:37,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:37,188 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:37,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4544,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:37,388 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash 984629569, now seen corresponding path program 568 times [2021-06-05 21:58:37,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:37,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589808779] [2021-06-05 21:58:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:37,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:37,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589808779] [2021-06-05 21:58:37,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589808779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:37,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213394250] [2021-06-05 21:58:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:37,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:37,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:37,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:37,977 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:38,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213394250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:38,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:38,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:38,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487843602] [2021-06-05 21:58:38,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:38,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:38,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:38,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:38,156 INFO L87 Difference]: Start difference. First operand 286 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:38,980 INFO L93 Difference]: Finished difference Result 327 states and 703 transitions. [2021-06-05 21:58:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:58:38,980 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:38,981 INFO L225 Difference]: With dead ends: 327 [2021-06-05 21:58:38,981 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 21:58:38,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1127.3ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:58:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 21:58:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2021-06-05 21:58:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-06-05 21:58:38,983 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-06-05 21:58:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:38,983 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-06-05 21:58:38,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-06-05 21:58:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:38,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:38,984 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:39,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4556 [2021-06-05 21:58:39,184 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:39,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1490975835, now seen corresponding path program 569 times [2021-06-05 21:58:39,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:39,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021039932] [2021-06-05 21:58:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:39,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:39,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021039932] [2021-06-05 21:58:39,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021039932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:39,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452164732] [2021-06-05 21:58:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:39,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:58:39,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:39,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452164732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:39,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:39,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277547789] [2021-06-05 21:58:39,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:39,885 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:40,959 INFO L93 Difference]: Finished difference Result 337 states and 716 transitions. [2021-06-05 21:58:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:58:40,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:40,959 INFO L225 Difference]: With dead ends: 337 [2021-06-05 21:58:40,960 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 21:58:40,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1330.1ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:58:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 21:58:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 285. [2021-06-05 21:58:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-06-05 21:58:40,962 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-06-05 21:58:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:40,962 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-06-05 21:58:40,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-06-05 21:58:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:40,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:40,962 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:41,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4568,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:41,163 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash -637109216, now seen corresponding path program 570 times [2021-06-05 21:58:41,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:41,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27566844] [2021-06-05 21:58:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:41,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27566844] [2021-06-05 21:58:41,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27566844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987726463] [2021-06-05 21:58:41,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:41,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:58:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:58:41,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:41,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987726463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:41,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:41,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:58:41,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855381444] [2021-06-05 21:58:41,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:58:41,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:58:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:58:41,547 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:41,766 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2021-06-05 21:58:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:58:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:41,767 INFO L225 Difference]: With dead ends: 304 [2021-06-05 21:58:41,767 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 21:58:41,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 21:58:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2021-06-05 21:58:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-05 21:58:41,769 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-05 21:58:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:41,769 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-05 21:58:41,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-05 21:58:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:41,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:41,769 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:41,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4585 [2021-06-05 21:58:41,970 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2007255709, now seen corresponding path program 571 times [2021-06-05 21:58:41,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:41,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349218779] [2021-06-05 21:58:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:42,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:42,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349218779] [2021-06-05 21:58:42,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349218779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:42,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238664271] [2021-06-05 21:58:42,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:42,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238664271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:42,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:42,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:42,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804484907] [2021-06-05 21:58:42,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:42,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:42,509 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:43,305 INFO L93 Difference]: Finished difference Result 345 states and 740 transitions. [2021-06-05 21:58:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:58:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:43,306 INFO L225 Difference]: With dead ends: 345 [2021-06-05 21:58:43,306 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 21:58:43,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:58:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 21:58:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-06-05 21:58:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-05 21:58:43,308 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-05 21:58:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:43,308 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-05 21:58:43,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-05 21:58:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:43,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:43,308 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:43,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4595 [2021-06-05 21:58:43,509 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash 7840897, now seen corresponding path program 572 times [2021-06-05 21:58:43,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:43,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701337073] [2021-06-05 21:58:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:43,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:43,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701337073] [2021-06-05 21:58:43,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701337073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:43,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133988779] [2021-06-05 21:58:43,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:43,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:44,036 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:44,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133988779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:44,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:44,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:44,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567665045] [2021-06-05 21:58:44,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:44,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:44,158 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:44,835 INFO L93 Difference]: Finished difference Result 336 states and 729 transitions. [2021-06-05 21:58:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:58:44,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:44,836 INFO L225 Difference]: With dead ends: 336 [2021-06-05 21:58:44,836 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 21:58:44,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 910.2ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:58:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 21:58:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 282. [2021-06-05 21:58:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2419928825622777) internal successors, (630), 281 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 630 transitions. [2021-06-05 21:58:44,838 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 630 transitions. Word has length 20 [2021-06-05 21:58:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:44,838 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 630 transitions. [2021-06-05 21:58:44,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 630 transitions. [2021-06-05 21:58:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:44,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:44,842 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:45,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:45,057 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:45,057 INFO L82 PathProgramCache]: Analyzing trace with hash 691347580, now seen corresponding path program 573 times [2021-06-05 21:58:45,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:45,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417893048] [2021-06-05 21:58:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:45,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:45,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417893048] [2021-06-05 21:58:45,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417893048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:45,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545406640] [2021-06-05 21:58:45,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:45,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:58:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:45,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545406640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:45,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:45,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:58:45,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12591680] [2021-06-05 21:58:45,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:58:45,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:45,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:58:45,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:58:45,449 INFO L87 Difference]: Start difference. First operand 282 states and 630 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:45,682 INFO L93 Difference]: Finished difference Result 298 states and 660 transitions. [2021-06-05 21:58:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:58:45,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:45,682 INFO L225 Difference]: With dead ends: 298 [2021-06-05 21:58:45,682 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 21:58:45,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 21:58:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-06-05 21:58:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-05 21:58:45,684 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-05 21:58:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:45,684 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-05 21:58:45,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-05 21:58:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:45,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:45,685 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:45,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4619 [2021-06-05 21:58:45,885 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash 804576649, now seen corresponding path program 574 times [2021-06-05 21:58:45,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:45,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420346444] [2021-06-05 21:58:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:46,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420346444] [2021-06-05 21:58:46,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420346444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033928242] [2021-06-05 21:58:46,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:46,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:46,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033928242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:46,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:46,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:46,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078687099] [2021-06-05 21:58:46,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:46,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:46,441 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:47,677 INFO L93 Difference]: Finished difference Result 365 states and 762 transitions. [2021-06-05 21:58:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:58:47,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:47,677 INFO L225 Difference]: With dead ends: 365 [2021-06-05 21:58:47,677 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 21:58:47,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1377.8ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:58:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 21:58:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2021-06-05 21:58:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2384341637010676) internal successors, (629), 281 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 629 transitions. [2021-06-05 21:58:47,679 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 629 transitions. Word has length 20 [2021-06-05 21:58:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:47,680 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 629 transitions. [2021-06-05 21:58:47,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 629 transitions. [2021-06-05 21:58:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:47,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:47,680 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:47,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4627,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:47,880 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1310922915, now seen corresponding path program 575 times [2021-06-05 21:58:47,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:47,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738852205] [2021-06-05 21:58:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:48,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:48,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738852205] [2021-06-05 21:58:48,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738852205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:48,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500064313] [2021-06-05 21:58:48,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:48,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:58:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:48,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:48,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500064313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:48,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:48,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:48,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955365265] [2021-06-05 21:58:48,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:48,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:48,507 INFO L87 Difference]: Start difference. First operand 282 states and 629 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,099 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 21:58:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:49,321 INFO L93 Difference]: Finished difference Result 351 states and 752 transitions. [2021-06-05 21:58:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:58:49,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:49,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:49,322 INFO L225 Difference]: With dead ends: 351 [2021-06-05 21:58:49,322 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 21:58:49,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1038.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:58:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 21:58:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 284. [2021-06-05 21:58:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-06-05 21:58:49,324 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-06-05 21:58:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:49,324 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-06-05 21:58:49,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,325 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-06-05 21:58:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:49,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:49,325 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:49,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-06-05 21:58:49,525 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:49,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1275298075, now seen corresponding path program 576 times [2021-06-05 21:58:49,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:49,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523640058] [2021-06-05 21:58:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:49,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523640058] [2021-06-05 21:58:49,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523640058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91873369] [2021-06-05 21:58:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:49,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:58:49,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:49,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:50,067 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:58:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:50,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91873369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:50,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:50,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:50,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297680178] [2021-06-05 21:58:50,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:50,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:50,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:50,190 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:50,846 INFO L93 Difference]: Finished difference Result 330 states and 717 transitions. [2021-06-05 21:58:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:58:50,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:50,847 INFO L225 Difference]: With dead ends: 330 [2021-06-05 21:58:50,847 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 21:58:50,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 930.1ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:58:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 21:58:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-06-05 21:58:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-06-05 21:58:50,849 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-06-05 21:58:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:50,849 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-06-05 21:58:50,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-06-05 21:58:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:50,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:50,849 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:51,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4652,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:51,050 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:51,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:51,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2072033827, now seen corresponding path program 577 times [2021-06-05 21:58:51,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:51,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444524648] [2021-06-05 21:58:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:51,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444524648] [2021-06-05 21:58:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444524648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662342223] [2021-06-05 21:58:51,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:51,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662342223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:51,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:51,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:51,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451985504] [2021-06-05 21:58:51,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:51,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:51,634 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:52,727 INFO L93 Difference]: Finished difference Result 354 states and 750 transitions. [2021-06-05 21:58:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:58:52,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:52,728 INFO L225 Difference]: With dead ends: 354 [2021-06-05 21:58:52,728 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 21:58:52,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1179.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:58:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 21:58:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 285. [2021-06-05 21:58:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-06-05 21:58:52,730 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-06-05 21:58:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:52,730 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-06-05 21:58:52,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-06-05 21:58:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:52,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:52,731 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:52,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:52,931 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1716587203, now seen corresponding path program 578 times [2021-06-05 21:58:52,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:52,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959200363] [2021-06-05 21:58:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:53,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959200363] [2021-06-05 21:58:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959200363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915772303] [2021-06-05 21:58:53,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:53,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:53,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:53,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:58:53,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915772303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:53,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:53,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:53,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762833596] [2021-06-05 21:58:53,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:53,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:53,570 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,066 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 21:58:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:54,306 INFO L93 Difference]: Finished difference Result 352 states and 756 transitions. [2021-06-05 21:58:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:58:54,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:54,307 INFO L225 Difference]: With dead ends: 352 [2021-06-05 21:58:54,307 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 21:58:54,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 928.5ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:58:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 21:58:54,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 285. [2021-06-05 21:58:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-06-05 21:58:54,309 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-06-05 21:58:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:54,310 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-06-05 21:58:54,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-06-05 21:58:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:54,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:54,310 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:54,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:54,510 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1095245155, now seen corresponding path program 579 times [2021-06-05 21:58:54,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:54,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080323397] [2021-06-05 21:58:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:54,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:54,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080323397] [2021-06-05 21:58:54,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080323397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:54,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316431976] [2021-06-05 21:58:54,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:54,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:54,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 21:58:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:55,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316431976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:55,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:55,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:58:55,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971777043] [2021-06-05 21:58:55,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:58:55,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:55,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:58:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:55,195 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:56,714 INFO L93 Difference]: Finished difference Result 425 states and 870 transitions. [2021-06-05 21:58:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:58:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:56,714 INFO L225 Difference]: With dead ends: 425 [2021-06-05 21:58:56,714 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 21:58:56,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1676.1ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:58:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 21:58:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 290. [2021-06-05 21:58:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.245674740484429) internal successors, (649), 289 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 649 transitions. [2021-06-05 21:58:56,717 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 649 transitions. Word has length 20 [2021-06-05 21:58:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:56,717 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 649 transitions. [2021-06-05 21:58:56,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 649 transitions. [2021-06-05 21:58:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:56,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:56,717 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:56,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:56,918 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1687729479, now seen corresponding path program 580 times [2021-06-05 21:58:56,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:56,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485205504] [2021-06-05 21:58:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:57,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:57,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485205504] [2021-06-05 21:58:57,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485205504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:57,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319104301] [2021-06-05 21:58:57,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:57,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:57,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:57,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:57,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:57,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319104301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:57,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:57,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:58:57,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406877348] [2021-06-05 21:58:57,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:58:57,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:57,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:58:57,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:57,584 INFO L87 Difference]: Start difference. First operand 290 states and 649 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:58,526 INFO L93 Difference]: Finished difference Result 336 states and 734 transitions. [2021-06-05 21:58:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:58:58,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:58,526 INFO L225 Difference]: With dead ends: 336 [2021-06-05 21:58:58,527 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 21:58:58,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1154.6ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:58:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 21:58:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 294. [2021-06-05 21:58:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-06-05 21:58:58,529 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-06-05 21:58:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:58,529 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-06-05 21:58:58,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-06-05 21:58:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:58,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:58,529 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:58,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:58,730 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:58,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1389676521, now seen corresponding path program 581 times [2021-06-05 21:58:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:58,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777516329] [2021-06-05 21:58:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:58,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777516329] [2021-06-05 21:58:58,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777516329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883033540] [2021-06-05 21:58:58,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:58,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:58,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:58:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:59,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883033540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:59,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:59,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:58:59,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334384698] [2021-06-05 21:58:59,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:58:59,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:59,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:58:59,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:59,459 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:00,045 INFO L93 Difference]: Finished difference Result 318 states and 690 transitions. [2021-06-05 21:59:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:00,046 INFO L225 Difference]: With dead ends: 318 [2021-06-05 21:59:00,046 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 21:59:00,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 996.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:59:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 21:59:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-06-05 21:59:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-06-05 21:59:00,048 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-06-05 21:59:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:00,048 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-06-05 21:59:00,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-06-05 21:59:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:00,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:00,049 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:00,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4716 [2021-06-05 21:59:00,249 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1252337401, now seen corresponding path program 582 times [2021-06-05 21:59:00,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:00,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555250895] [2021-06-05 21:59:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:00,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:00,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555250895] [2021-06-05 21:59:00,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555250895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:00,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175689174] [2021-06-05 21:59:00,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:00,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:00,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:00,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175689174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:01,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:01,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:01,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709320164] [2021-06-05 21:59:01,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:01,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:01,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:01,097 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:01,818 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-06-05 21:59:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:01,819 INFO L225 Difference]: With dead ends: 308 [2021-06-05 21:59:01,819 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 21:59:01,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1189.6ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:59:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 21:59:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-06-05 21:59:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-06-05 21:59:01,821 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-06-05 21:59:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:01,821 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-06-05 21:59:01,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-06-05 21:59:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:01,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:01,821 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:02,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4728 [2021-06-05 21:59:02,022 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash -325004329, now seen corresponding path program 583 times [2021-06-05 21:59:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:02,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122233465] [2021-06-05 21:59:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:02,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:02,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122233465] [2021-06-05 21:59:02,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122233465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:02,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491497625] [2021-06-05 21:59:02,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:02,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:02,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:02,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491497625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:02,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:02,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:02,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722270684] [2021-06-05 21:59:02,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:02,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:02,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:02,831 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:04,399 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-06-05 21:59:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:59:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:04,399 INFO L225 Difference]: With dead ends: 342 [2021-06-05 21:59:04,399 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 21:59:04,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1855.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:59:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 21:59:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 291. [2021-06-05 21:59:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2448275862068967) internal successors, (651), 290 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 651 transitions. [2021-06-05 21:59:04,402 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 651 transitions. Word has length 20 [2021-06-05 21:59:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:04,402 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 651 transitions. [2021-06-05 21:59:04,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 651 transitions. [2021-06-05 21:59:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:04,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:04,402 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:04,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:04,603 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash -122219343, now seen corresponding path program 584 times [2021-06-05 21:59:04,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:04,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368294481] [2021-06-05 21:59:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:04,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:04,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368294481] [2021-06-05 21:59:04,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368294481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:04,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335339873] [2021-06-05 21:59:04,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:04,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:04,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:04,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:05,147 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:59:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:05,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335339873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:05,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:05,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:05,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552315118] [2021-06-05 21:59:05,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:05,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:05,357 INFO L87 Difference]: Start difference. First operand 291 states and 651 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:05,892 INFO L93 Difference]: Finished difference Result 308 states and 676 transitions. [2021-06-05 21:59:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:05,893 INFO L225 Difference]: With dead ends: 308 [2021-06-05 21:59:05,893 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 21:59:05,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:59:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 21:59:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-06-05 21:59:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-06-05 21:59:05,895 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-06-05 21:59:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:05,895 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-06-05 21:59:05,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-06-05 21:59:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:05,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:05,895 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:06,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4755 [2021-06-05 21:59:06,096 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1775172717, now seen corresponding path program 585 times [2021-06-05 21:59:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:06,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868275537] [2021-06-05 21:59:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:06,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:06,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868275537] [2021-06-05 21:59:06,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868275537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:06,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123226020] [2021-06-05 21:59:06,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:06,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:59:06,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:06,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:06,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123226020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:06,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:06,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:06,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973495431] [2021-06-05 21:59:06,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:06,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:06,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:06,752 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:07,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:07,679 INFO L93 Difference]: Finished difference Result 326 states and 714 transitions. [2021-06-05 21:59:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:59:07,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:07,679 INFO L225 Difference]: With dead ends: 326 [2021-06-05 21:59:07,679 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 21:59:07,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1204.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:59:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 21:59:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-06-05 21:59:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.2457337883959045) internal successors, (658), 293 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 658 transitions. [2021-06-05 21:59:07,682 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 658 transitions. Word has length 20 [2021-06-05 21:59:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:07,682 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 658 transitions. [2021-06-05 21:59:07,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 658 transitions. [2021-06-05 21:59:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:07,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:07,682 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:07,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4767,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:07,883 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash 942452849, now seen corresponding path program 586 times [2021-06-05 21:59:07,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:07,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914825244] [2021-06-05 21:59:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:08,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:08,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914825244] [2021-06-05 21:59:08,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914825244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:08,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932132085] [2021-06-05 21:59:08,180 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 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:08,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:08,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:08,487 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:59:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:08,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932132085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:08,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:08,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:08,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027462693] [2021-06-05 21:59:08,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:08,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:08,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:08,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:08,750 INFO L87 Difference]: Start difference. First operand 294 states and 658 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:09,843 INFO L93 Difference]: Finished difference Result 347 states and 739 transitions. [2021-06-05 21:59:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:59:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:09,844 INFO L225 Difference]: With dead ends: 347 [2021-06-05 21:59:09,844 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 21:59:09,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1540.7ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:59:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 21:59:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 292. [2021-06-05 21:59:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.2439862542955327) internal successors, (653), 291 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 653 transitions. [2021-06-05 21:59:09,846 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 653 transitions. Word has length 20 [2021-06-05 21:59:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:09,846 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 653 transitions. [2021-06-05 21:59:09,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 653 transitions. [2021-06-05 21:59:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:09,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:09,846 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:10,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4782 [2021-06-05 21:59:10,047 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1036659641, now seen corresponding path program 587 times [2021-06-05 21:59:10,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:10,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804690823] [2021-06-05 21:59:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:10,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:10,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804690823] [2021-06-05 21:59:10,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804690823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:10,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964991912] [2021-06-05 21:59:10,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:10,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:59:10,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:10,616 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964991912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:10,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:10,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614220290] [2021-06-05 21:59:10,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:10,783 INFO L87 Difference]: Start difference. First operand 292 states and 653 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:11,315 INFO L93 Difference]: Finished difference Result 309 states and 679 transitions. [2021-06-05 21:59:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:11,316 INFO L225 Difference]: With dead ends: 309 [2021-06-05 21:59:11,316 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 21:59:11,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 914.7ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 21:59:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2021-06-05 21:59:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-06-05 21:59:11,318 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-06-05 21:59:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:11,318 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-06-05 21:59:11,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-06-05 21:59:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:11,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:11,318 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:11,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4794 [2021-06-05 21:59:11,519 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -540682089, now seen corresponding path program 588 times [2021-06-05 21:59:11,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:11,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131860906] [2021-06-05 21:59:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:11,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131860906] [2021-06-05 21:59:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131860906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497527388] [2021-06-05 21:59:11,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:11,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:59:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:12,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497527388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:12,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:12,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779843759] [2021-06-05 21:59:12,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:12,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:12,244 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:13,521 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-06-05 21:59:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:59:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:13,522 INFO L225 Difference]: With dead ends: 342 [2021-06-05 21:59:13,522 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 21:59:13,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1563.0ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:59:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 21:59:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 293. [2021-06-05 21:59:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-06-05 21:59:13,524 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-06-05 21:59:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:13,524 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-06-05 21:59:13,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-06-05 21:59:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:13,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:13,524 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:13,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4806 [2021-06-05 21:59:13,725 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash -34335823, now seen corresponding path program 589 times [2021-06-05 21:59:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:13,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128993411] [2021-06-05 21:59:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:13,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:13,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128993411] [2021-06-05 21:59:13,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128993411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:13,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658987331] [2021-06-05 21:59:13,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:13,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:14,311 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:14,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658987331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:14,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:14,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:14,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500215125] [2021-06-05 21:59:14,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:14,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:14,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:14,435 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:15,862 INFO L93 Difference]: Finished difference Result 388 states and 813 transitions. [2021-06-05 21:59:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:59:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:15,863 INFO L225 Difference]: With dead ends: 388 [2021-06-05 21:59:15,863 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 21:59:15,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1665.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:59:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 21:59:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 297. [2021-06-05 21:59:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-06-05 21:59:15,865 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-06-05 21:59:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:15,865 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-06-05 21:59:15,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-06-05 21:59:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:15,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:15,866 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:16,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4821 [2021-06-05 21:59:16,066 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash 762399929, now seen corresponding path program 590 times [2021-06-05 21:59:16,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:16,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871221570] [2021-06-05 21:59:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:16,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871221570] [2021-06-05 21:59:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871221570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005502610] [2021-06-05 21:59:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:16,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:16,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005502610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:16,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:16,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:59:16,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913975015] [2021-06-05 21:59:16,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:59:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:59:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:16,712 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:17,423 INFO L93 Difference]: Finished difference Result 364 states and 787 transitions. [2021-06-05 21:59:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:59:17,424 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:17,424 INFO L225 Difference]: With dead ends: 364 [2021-06-05 21:59:17,424 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 21:59:17,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:59:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 21:59:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2021-06-05 21:59:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-06-05 21:59:17,427 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-06-05 21:59:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:17,427 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-06-05 21:59:17,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-06-05 21:59:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:17,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:17,427 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:17,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4833,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:17,627 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 514247511, now seen corresponding path program 591 times [2021-06-05 21:59:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:17,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525970859] [2021-06-05 21:59:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:17,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:17,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525970859] [2021-06-05 21:59:17,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525970859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:17,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5270119] [2021-06-05 21:59:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:18,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:59:18,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 21:59:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:18,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5270119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:18,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:18,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:18,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990273205] [2021-06-05 21:59:18,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:18,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:18,417 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:18,857 INFO L93 Difference]: Finished difference Result 315 states and 695 transitions. [2021-06-05 21:59:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:18,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:18,857 INFO L225 Difference]: With dead ends: 315 [2021-06-05 21:59:18,857 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 21:59:18,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 21:59:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-06-05 21:59:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.254180602006689) internal successors, (674), 299 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 674 transitions. [2021-06-05 21:59:18,860 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 674 transitions. Word has length 20 [2021-06-05 21:59:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:18,860 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 674 transitions. [2021-06-05 21:59:18,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 674 transitions. [2021-06-05 21:59:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:18,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:18,860 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:19,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4845 [2021-06-05 21:59:19,069 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1138705863, now seen corresponding path program 592 times [2021-06-05 21:59:19,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:19,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890173723] [2021-06-05 21:59:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:19,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890173723] [2021-06-05 21:59:19,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890173723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295619312] [2021-06-05 21:59:19,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:19,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:19,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:19,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:19,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295619312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:19,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:19,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:19,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113431014] [2021-06-05 21:59:19,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:19,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:19,803 INFO L87 Difference]: Start difference. First operand 300 states and 674 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:20,431 INFO L93 Difference]: Finished difference Result 325 states and 711 transitions. [2021-06-05 21:59:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:20,432 INFO L225 Difference]: With dead ends: 325 [2021-06-05 21:59:20,432 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 21:59:20,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1024.1ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:59:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 21:59:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 301. [2021-06-05 21:59:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.256666666666667) internal successors, (677), 300 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 677 transitions. [2021-06-05 21:59:20,434 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 677 transitions. Word has length 20 [2021-06-05 21:59:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:20,434 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 677 transitions. [2021-06-05 21:59:20,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 677 transitions. [2021-06-05 21:59:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:20,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:20,435 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:20,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4859,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:20,637 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1578919703, now seen corresponding path program 593 times [2021-06-05 21:59:20,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:20,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128985765] [2021-06-05 21:59:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:20,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128985765] [2021-06-05 21:59:20,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128985765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143232555] [2021-06-05 21:59:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:20,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:20,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:21,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143232555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:21,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:21,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:21,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301182257] [2021-06-05 21:59:21,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:21,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:21,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:21,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:21,426 INFO L87 Difference]: Start difference. First operand 301 states and 677 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:22,595 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-06-05 21:59:22,880 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-06-05 21:59:23,063 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2021-06-05 21:59:23,439 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 21:59:23,590 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-05 21:59:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:23,923 INFO L93 Difference]: Finished difference Result 380 states and 812 transitions. [2021-06-05 21:59:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:59:23,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:23,924 INFO L225 Difference]: With dead ends: 380 [2021-06-05 21:59:23,924 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 21:59:23,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2795.7ms TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:59:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 21:59:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 303. [2021-06-05 21:59:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2582781456953644) internal successors, (682), 302 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 682 transitions. [2021-06-05 21:59:23,926 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 682 transitions. Word has length 20 [2021-06-05 21:59:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:23,927 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 682 transitions. [2021-06-05 21:59:23,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 682 transitions. [2021-06-05 21:59:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:23,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:23,927 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:24,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:24,127 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1381456263, now seen corresponding path program 594 times [2021-06-05 21:59:24,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:24,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891558826] [2021-06-05 21:59:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:24,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:24,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891558826] [2021-06-05 21:59:24,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891558826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:24,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71764808] [2021-06-05 21:59:24,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:24,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:24,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:24,632 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:59:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:24,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71764808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:24,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:24,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:24,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005749859] [2021-06-05 21:59:24,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:24,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:24,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:24,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:24,861 INFO L87 Difference]: Start difference. First operand 303 states and 682 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:25,466 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 21:59:25,782 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-06-05 21:59:26,070 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-05 21:59:26,310 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 21:59:26,680 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-06-05 21:59:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:26,763 INFO L93 Difference]: Finished difference Result 384 states and 824 transitions. [2021-06-05 21:59:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:59:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:26,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:26,766 INFO L225 Difference]: With dead ends: 384 [2021-06-05 21:59:26,766 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 21:59:26,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2167.7ms TimeCoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:59:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 21:59:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 299. [2021-06-05 21:59:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.2550335570469797) internal successors, (672), 298 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 672 transitions. [2021-06-05 21:59:26,769 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 672 transitions. Word has length 20 [2021-06-05 21:59:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:26,769 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 672 transitions. [2021-06-05 21:59:26,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 672 transitions. [2021-06-05 21:59:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:26,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:26,769 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:26,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4889 [2021-06-05 21:59:26,969 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1673126495, now seen corresponding path program 595 times [2021-06-05 21:59:26,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:26,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542056927] [2021-06-05 21:59:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:27,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:27,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542056927] [2021-06-05 21:59:27,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542056927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:27,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247101507] [2021-06-05 21:59:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:27,524 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:27,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247101507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:27,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:27,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:27,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693194431] [2021-06-05 21:59:27,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:27,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:27,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:27,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:27,680 INFO L87 Difference]: Start difference. First operand 299 states and 672 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:28,128 INFO L93 Difference]: Finished difference Result 314 states and 694 transitions. [2021-06-05 21:59:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:28,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:28,129 INFO L225 Difference]: With dead ends: 314 [2021-06-05 21:59:28,129 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 21:59:28,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 21:59:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-06-05 21:59:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.2533333333333334) internal successors, (676), 300 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 676 transitions. [2021-06-05 21:59:28,131 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 676 transitions. Word has length 20 [2021-06-05 21:59:28,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:28,131 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 676 transitions. [2021-06-05 21:59:28,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 676 transitions. [2021-06-05 21:59:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:28,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:28,132 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:28,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4902,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:28,332 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 95784765, now seen corresponding path program 596 times [2021-06-05 21:59:28,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:28,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750830218] [2021-06-05 21:59:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:28,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750830218] [2021-06-05 21:59:28,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750830218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076571314] [2021-06-05 21:59:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:28,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:28,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:28,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:28,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:28,873 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:29,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076571314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:29,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:29,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464623165] [2021-06-05 21:59:29,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:29,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:29,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:29,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:29,055 INFO L87 Difference]: Start difference. First operand 301 states and 676 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:29,805 INFO L93 Difference]: Finished difference Result 327 states and 717 transitions. [2021-06-05 21:59:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:59:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:29,805 INFO L225 Difference]: With dead ends: 327 [2021-06-05 21:59:29,805 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 21:59:29,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 21:59:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 302. [2021-06-05 21:59:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.2524916943521593) internal successors, (678), 301 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 678 transitions. [2021-06-05 21:59:29,808 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 678 transitions. Word has length 20 [2021-06-05 21:59:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:29,808 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 678 transitions. [2021-06-05 21:59:29,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 678 transitions. [2021-06-05 21:59:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:29,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:29,808 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:30,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-06-05 21:59:30,008 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1430376095, now seen corresponding path program 597 times [2021-06-05 21:59:30,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:30,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326094334] [2021-06-05 21:59:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:30,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:30,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326094334] [2021-06-05 21:59:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326094334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:30,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537230020] [2021-06-05 21:59:30,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:30,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:59:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:30,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537230020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:30,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:30,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050736423] [2021-06-05 21:59:30,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:30,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:30,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:30,600 INFO L87 Difference]: Start difference. First operand 302 states and 678 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:31,730 INFO L93 Difference]: Finished difference Result 373 states and 802 transitions. [2021-06-05 21:59:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:59:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:31,731 INFO L225 Difference]: With dead ends: 373 [2021-06-05 21:59:31,731 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 21:59:31,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1356.0ms TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:59:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 21:59:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 303. [2021-06-05 21:59:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.251655629139073) internal successors, (680), 302 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 680 transitions. [2021-06-05 21:59:31,734 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 680 transitions. Word has length 20 [2021-06-05 21:59:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:31,734 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 680 transitions. [2021-06-05 21:59:31,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 680 transitions. [2021-06-05 21:59:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:31,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:31,734 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:31,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4926,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:31,934 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash 602131031, now seen corresponding path program 598 times [2021-06-05 21:59:31,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:31,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580078990] [2021-06-05 21:59:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:32,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580078990] [2021-06-05 21:59:32,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580078990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763961582] [2021-06-05 21:59:32,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:32,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:32,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:32,501 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:32,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763961582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:32,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:32,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:32,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885437039] [2021-06-05 21:59:32,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:32,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:32,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:32,619 INFO L87 Difference]: Start difference. First operand 303 states and 680 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:33,326 INFO L93 Difference]: Finished difference Result 356 states and 766 transitions. [2021-06-05 21:59:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:33,327 INFO L225 Difference]: With dead ends: 356 [2021-06-05 21:59:33,327 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 21:59:33,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1050.7ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:59:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 21:59:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 305. [2021-06-05 21:59:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.25) internal successors, (684), 304 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 684 transitions. [2021-06-05 21:59:33,329 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 684 transitions. Word has length 20 [2021-06-05 21:59:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:33,330 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 684 transitions. [2021-06-05 21:59:33,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 684 transitions. [2021-06-05 21:59:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:33,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:33,330 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:33,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4938 [2021-06-05 21:59:33,530 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:33,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:33,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1936722361, now seen corresponding path program 599 times [2021-06-05 21:59:33,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:33,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819903812] [2021-06-05 21:59:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:33,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:33,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819903812] [2021-06-05 21:59:33,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819903812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:33,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293799730] [2021-06-05 21:59:33,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:33,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:59:33,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:33,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:34,078 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:34,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293799730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:34,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:34,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:34,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152454543] [2021-06-05 21:59:34,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:34,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:34,197 INFO L87 Difference]: Start difference. First operand 305 states and 684 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:35,076 INFO L93 Difference]: Finished difference Result 374 states and 801 transitions. [2021-06-05 21:59:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:59:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:35,077 INFO L225 Difference]: With dead ends: 374 [2021-06-05 21:59:35,077 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 21:59:35,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1090.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:59:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 21:59:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 306. [2021-06-05 21:59:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-06-05 21:59:35,080 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-06-05 21:59:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:35,080 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-06-05 21:59:35,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-06-05 21:59:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:35,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:35,080 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:35,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4950,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:35,280 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1398866783, now seen corresponding path program 600 times [2021-06-05 21:59:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:35,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957061400] [2021-06-05 21:59:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:35,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:35,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957061400] [2021-06-05 21:59:35,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957061400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:35,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525424520] [2021-06-05 21:59:35,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:35,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:59:35,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:35,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525424520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:35,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:35,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:35,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893506575] [2021-06-05 21:59:35,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:35,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:35,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:35,837 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:36,526 INFO L93 Difference]: Finished difference Result 369 states and 798 transitions. [2021-06-05 21:59:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:36,527 INFO L225 Difference]: With dead ends: 369 [2021-06-05 21:59:36,527 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 21:59:36,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 750.0ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:59:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 21:59:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 306. [2021-06-05 21:59:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-06-05 21:59:36,529 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-06-05 21:59:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:36,529 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-06-05 21:59:36,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-06-05 21:59:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:36,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:36,530 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:36,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4963,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:36,730 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1354383623, now seen corresponding path program 601 times [2021-06-05 21:59:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:36,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869340487] [2021-06-05 21:59:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:36,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869340487] [2021-06-05 21:59:36,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869340487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309550093] [2021-06-05 21:59:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:37,262 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:37,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309550093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:37,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:37,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:37,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582002684] [2021-06-05 21:59:37,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:37,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:37,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:37,420 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:37,714 INFO L93 Difference]: Finished difference Result 322 states and 710 transitions. [2021-06-05 21:59:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:37,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:37,715 INFO L225 Difference]: With dead ends: 322 [2021-06-05 21:59:37,715 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 21:59:37,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 694.6ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 21:59:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-06-05 21:59:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.2467532467532467) internal successors, (692), 308 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 692 transitions. [2021-06-05 21:59:37,717 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 692 transitions. Word has length 20 [2021-06-05 21:59:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:37,718 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 692 transitions. [2021-06-05 21:59:37,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 692 transitions. [2021-06-05 21:59:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:37,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:37,718 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:37,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:37,918 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:37,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:37,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1363241943, now seen corresponding path program 602 times [2021-06-05 21:59:37,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:37,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100306241] [2021-06-05 21:59:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:38,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100306241] [2021-06-05 21:59:38,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100306241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158632590] [2021-06-05 21:59:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:38,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:38,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:38,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:38,469 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158632590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:38,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:38,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585669021] [2021-06-05 21:59:38,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:38,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:38,651 INFO L87 Difference]: Start difference. First operand 309 states and 692 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:39,349 INFO L93 Difference]: Finished difference Result 337 states and 737 transitions. [2021-06-05 21:59:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:59:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:39,350 INFO L225 Difference]: With dead ends: 337 [2021-06-05 21:59:39,350 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 21:59:39,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1064.1ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 21:59:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 310. [2021-06-05 21:59:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.2459546925566345) internal successors, (694), 309 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 694 transitions. [2021-06-05 21:59:39,352 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 694 transitions. Word has length 20 [2021-06-05 21:59:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:39,352 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 694 transitions. [2021-06-05 21:59:39,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 694 transitions. [2021-06-05 21:59:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:39,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:39,352 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:39,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4987 [2021-06-05 21:59:39,553 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1597134023, now seen corresponding path program 603 times [2021-06-05 21:59:39,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:39,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820876518] [2021-06-05 21:59:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:39,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:39,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820876518] [2021-06-05 21:59:39,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820876518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:39,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439933369] [2021-06-05 21:59:39,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:39,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:59:39,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 21:59:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:40,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439933369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:40,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:40,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:40,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979398349] [2021-06-05 21:59:40,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:40,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:40,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:40,219 INFO L87 Difference]: Start difference. First operand 310 states and 694 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:40,913 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 21:59:41,083 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 21:59:41,310 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 21:59:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:41,599 INFO L93 Difference]: Finished difference Result 406 states and 855 transitions. [2021-06-05 21:59:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:59:41,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:41,600 INFO L225 Difference]: With dead ends: 406 [2021-06-05 21:59:41,600 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 21:59:41,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1547.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:59:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 21:59:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 308. [2021-06-05 21:59:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.247557003257329) internal successors, (690), 307 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 690 transitions. [2021-06-05 21:59:41,602 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 690 transitions. Word has length 20 [2021-06-05 21:59:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:41,602 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 690 transitions. [2021-06-05 21:59:41,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 690 transitions. [2021-06-05 21:59:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:41,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:41,603 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:41,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4999,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:41,803 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1869588209, now seen corresponding path program 604 times [2021-06-05 21:59:41,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:41,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354174641] [2021-06-05 21:59:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:42,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:42,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354174641] [2021-06-05 21:59:42,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354174641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:42,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769192238] [2021-06-05 21:59:42,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:42,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:42,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:42,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:42,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769192238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:42,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:42,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:42,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873101262] [2021-06-05 21:59:42,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:42,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:42,529 INFO L87 Difference]: Start difference. First operand 308 states and 690 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:44,147 INFO L93 Difference]: Finished difference Result 393 states and 830 transitions. [2021-06-05 21:59:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:59:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:44,147 INFO L225 Difference]: With dead ends: 393 [2021-06-05 21:59:44,147 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 21:59:44,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1855.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:59:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 21:59:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2021-06-05 21:59:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-06-05 21:59:44,150 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-06-05 21:59:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:44,150 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-06-05 21:59:44,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-06-05 21:59:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:44,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:44,150 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:44,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5014 [2021-06-05 21:59:44,351 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:44,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1628643335, now seen corresponding path program 605 times [2021-06-05 21:59:44,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:44,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229333486] [2021-06-05 21:59:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:44,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229333486] [2021-06-05 21:59:44,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229333486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945045574] [2021-06-05 21:59:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:44,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:59:44,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:44,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:44,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945045574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:44,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:44,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239155516] [2021-06-05 21:59:44,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:44,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:44,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:44,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:44,901 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:45,560 INFO L93 Difference]: Finished difference Result 373 states and 807 transitions. [2021-06-05 21:59:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:59:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:45,560 INFO L225 Difference]: With dead ends: 373 [2021-06-05 21:59:45,560 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 21:59:45,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 21:59:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 310. [2021-06-05 21:59:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-06-05 21:59:45,563 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-06-05 21:59:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:45,563 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-06-05 21:59:45,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-06-05 21:59:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:45,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:45,563 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:45,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5028,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:45,777 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:45,778 INFO L82 PathProgramCache]: Analyzing trace with hash 386453271, now seen corresponding path program 606 times [2021-06-05 21:59:45,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:45,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419393323] [2021-06-05 21:59:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:46,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:46,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419393323] [2021-06-05 21:59:46,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419393323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:46,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114342813] [2021-06-05 21:59:46,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:46,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:59:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:46,383 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 21:59:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114342813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:46,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:46,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283711289] [2021-06-05 21:59:46,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:46,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:46,514 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:47,267 INFO L93 Difference]: Finished difference Result 357 states and 778 transitions. [2021-06-05 21:59:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:59:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:47,268 INFO L225 Difference]: With dead ends: 357 [2021-06-05 21:59:47,268 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 21:59:47,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1103.8ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:59:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 21:59:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 313. [2021-06-05 21:59:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.246794871794872) internal successors, (701), 312 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 701 transitions. [2021-06-05 21:59:47,270 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 701 transitions. Word has length 20 [2021-06-05 21:59:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:47,271 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 701 transitions. [2021-06-05 21:59:47,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 701 transitions. [2021-06-05 21:59:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:47,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:47,271 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:47,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5041 [2021-06-05 21:59:47,471 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:47,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1721044601, now seen corresponding path program 607 times [2021-06-05 21:59:47,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:47,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141473076] [2021-06-05 21:59:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:47,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:47,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141473076] [2021-06-05 21:59:47,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141473076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:47,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436166509] [2021-06-05 21:59:47,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 21:59:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:48,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436166509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:48,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:48,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767804238] [2021-06-05 21:59:48,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:48,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:48,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:48,197 INFO L87 Difference]: Start difference. First operand 313 states and 701 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:48,737 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 21:59:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:49,447 INFO L93 Difference]: Finished difference Result 383 states and 817 transitions. [2021-06-05 21:59:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:59:49,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:49,447 INFO L225 Difference]: With dead ends: 383 [2021-06-05 21:59:49,447 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 21:59:49,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1536.7ms TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:59:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 21:59:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 314. [2021-06-05 21:59:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-05 21:59:49,450 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-05 21:59:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:49,450 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-05 21:59:49,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-05 21:59:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:49,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:49,450 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:49,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5053 [2021-06-05 21:59:49,651 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1183189023, now seen corresponding path program 608 times [2021-06-05 21:59:49,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:49,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632099706] [2021-06-05 21:59:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:49,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:49,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632099706] [2021-06-05 21:59:49,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632099706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085354864] [2021-06-05 21:59:49,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:49,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:49,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:49,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:50,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085354864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:50,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:50,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:50,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025701838] [2021-06-05 21:59:50,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:50,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:50,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:50,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:50,260 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:51,271 INFO L93 Difference]: Finished difference Result 398 states and 841 transitions. [2021-06-05 21:59:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:59:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:51,271 INFO L225 Difference]: With dead ends: 398 [2021-06-05 21:59:51,271 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 21:59:51,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1215.3ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:59:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 21:59:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-06-05 21:59:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-05 21:59:51,274 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-05 21:59:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:51,274 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-05 21:59:51,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-05 21:59:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:51,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:51,275 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:51,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5063 [2021-06-05 21:59:51,475 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1689535289, now seen corresponding path program 609 times [2021-06-05 21:59:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:51,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129744339] [2021-06-05 21:59:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:51,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:51,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129744339] [2021-06-05 21:59:51,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129744339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:51,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669431394] [2021-06-05 21:59:51,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:51,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:59:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 21:59:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:52,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669431394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:52,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:52,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:52,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988255863] [2021-06-05 21:59:52,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:52,116 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:52,861 INFO L93 Difference]: Finished difference Result 382 states and 826 transitions. [2021-06-05 21:59:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:59:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:52,862 INFO L225 Difference]: With dead ends: 382 [2021-06-05 21:59:52,862 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 21:59:52,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 879.7ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:59:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 21:59:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 314. [2021-06-05 21:59:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-05 21:59:52,864 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-05 21:59:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:52,864 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-05 21:59:52,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-05 21:59:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:52,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:52,865 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:53,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5075,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:53,065 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1230116495, now seen corresponding path program 610 times [2021-06-05 21:59:53,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:53,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846733020] [2021-06-05 21:59:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:53,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:53,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846733020] [2021-06-05 21:59:53,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846733020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:53,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980216201] [2021-06-05 21:59:53,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:53,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:53,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:53,617 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:59:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:53,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980216201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:53,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:53,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:53,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390320000] [2021-06-05 21:59:53,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:53,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:53,819 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:54,183 INFO L93 Difference]: Finished difference Result 330 states and 727 transitions. [2021-06-05 21:59:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:54,184 INFO L225 Difference]: With dead ends: 330 [2021-06-05 21:59:54,184 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 21:59:54,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 827.1ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 21:59:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-06-05 21:59:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.248407643312102) internal successors, (706), 314 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 706 transitions. [2021-06-05 21:59:54,186 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 706 transitions. Word has length 20 [2021-06-05 21:59:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:54,186 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 706 transitions. [2021-06-05 21:59:54,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 706 transitions. [2021-06-05 21:59:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:54,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:54,187 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:54,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5088 [2021-06-05 21:59:54,387 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:54,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1411897427, now seen corresponding path program 611 times [2021-06-05 21:59:54,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:54,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109276604] [2021-06-05 21:59:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:54,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:54,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109276604] [2021-06-05 21:59:54,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109276604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:54,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918524657] [2021-06-05 21:59:54,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:54,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:59:54,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:54,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 21:59:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:54,919 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:59:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:55,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918524657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:55,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:55,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:55,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244623569] [2021-06-05 21:59:55,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:55,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:55,139 INFO L87 Difference]: Start difference. First operand 315 states and 706 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:55,510 INFO L93 Difference]: Finished difference Result 329 states and 726 transitions. [2021-06-05 21:59:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:55,511 INFO L225 Difference]: With dead ends: 329 [2021-06-05 21:59:55,511 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 21:59:55,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 21:59:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-06-05 21:59:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-06-05 21:59:55,513 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-06-05 21:59:55,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:55,513 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-06-05 21:59:55,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-06-05 21:59:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:55,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:55,514 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:55,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5100 [2021-06-05 21:59:55,728 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:55,728 INFO L82 PathProgramCache]: Analyzing trace with hash -165444303, now seen corresponding path program 612 times [2021-06-05 21:59:55,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:55,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576172127] [2021-06-05 21:59:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:56,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:56,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576172127] [2021-06-05 21:59:56,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576172127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:56,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265496678] [2021-06-05 21:59:56,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:56,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:59:56,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:56,306 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 21:59:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:56,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265496678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:56,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:56,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:56,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337737044] [2021-06-05 21:59:56,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:56,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:56,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:56,551 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:57,280 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 21:59:57,508 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-06-05 21:59:57,670 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-06-05 21:59:57,934 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-06-05 21:59:58,221 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-06-05 21:59:58,372 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 21:59:58,502 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-05 21:59:58,715 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-06-05 21:59:58,934 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-06-05 21:59:59,133 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 21:59:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:59,177 INFO L93 Difference]: Finished difference Result 404 states and 851 transitions. [2021-06-05 21:59:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:59:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:59,178 INFO L225 Difference]: With dead ends: 404 [2021-06-05 21:59:59,178 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 21:59:59,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2916.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:59:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 21:59:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 314. [2021-06-05 21:59:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-05 21:59:59,181 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-05 21:59:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:59,181 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-05 21:59:59,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-05 21:59:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:59,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:59,181 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:59,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5112 [2021-06-05 21:59:59,382 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash -71237511, now seen corresponding path program 613 times [2021-06-05 21:59:59,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:59,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069795738] [2021-06-05 21:59:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:59,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:59,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069795738] [2021-06-05 21:59:59,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069795738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:59,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044250762] [2021-06-05 21:59:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:59,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 21:59:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:59,964 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 22:00:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044250762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:00,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:00,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598120832] [2021-06-05 22:00:00,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:00,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:00,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:00,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:00,142 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:00,545 INFO L93 Difference]: Finished difference Result 330 states and 728 transitions. [2021-06-05 22:00:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:00:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:00,546 INFO L225 Difference]: With dead ends: 330 [2021-06-05 22:00:00,546 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:00:00,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 874.4ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:00:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2021-06-05 22:00:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-06-05 22:00:00,548 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-06-05 22:00:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:00,548 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-06-05 22:00:00,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-06-05 22:00:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:00,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:00,549 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:00,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5124,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:00,749 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1648579241, now seen corresponding path program 614 times [2021-06-05 22:00:00,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:00,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019406722] [2021-06-05 22:00:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019406722] [2021-06-05 22:00:00,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019406722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743784424] [2021-06-05 22:00:00,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:01,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:01,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:01,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:01,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:01,316 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:01,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743784424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:01,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:01,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:01,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451471293] [2021-06-05 22:00:01,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:01,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:01,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:01,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:01,516 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,024 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 22:00:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:02,778 INFO L93 Difference]: Finished difference Result 381 states and 826 transitions. [2021-06-05 22:00:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:02,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:02,778 INFO L225 Difference]: With dead ends: 381 [2021-06-05 22:00:02,779 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:00:02,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1609.9ms TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:00:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:00:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 318. [2021-06-05 22:00:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2523659305993693) internal successors, (714), 317 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 714 transitions. [2021-06-05 22:00:02,781 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 714 transitions. Word has length 20 [2021-06-05 22:00:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:02,781 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 714 transitions. [2021-06-05 22:00:02,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 714 transitions. [2021-06-05 22:00:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:02,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:02,782 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:02,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-06-05 22:00:02,982 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash -313987911, now seen corresponding path program 615 times [2021-06-05 22:00:02,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:02,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744709328] [2021-06-05 22:00:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:03,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744709328] [2021-06-05 22:00:03,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744709328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148188412] [2021-06-05 22:00:03,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:03,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:00:03,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:03,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:03,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148188412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:03,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:03,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641943189] [2021-06-05 22:00:03,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:03,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:03,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:03,767 INFO L87 Difference]: Start difference. First operand 318 states and 714 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,858 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 22:00:05,071 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 22:00:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:05,286 INFO L93 Difference]: Finished difference Result 384 states and 823 transitions. [2021-06-05 22:00:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:00:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:05,287 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:00:05,287 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 22:00:05,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1831.9ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:00:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 22:00:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 322. [2021-06-05 22:00:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-06-05 22:00:05,290 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-06-05 22:00:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:05,290 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-06-05 22:00:05,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-06-05 22:00:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:05,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:05,290 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:05,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:05,501 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1142232975, now seen corresponding path program 616 times [2021-06-05 22:00:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:05,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53839620] [2021-06-05 22:00:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:05,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:05,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53839620] [2021-06-05 22:00:05,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53839620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:05,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909387345] [2021-06-05 22:00:05,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:05,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:05,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:05,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:06,147 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909387345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:06,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:06,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:06,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565648858] [2021-06-05 22:00:06,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:06,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:06,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:06,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:06,273 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:07,213 INFO L93 Difference]: Finished difference Result 376 states and 818 transitions. [2021-06-05 22:00:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:00:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:07,214 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:00:07,214 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 22:00:07,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1302.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:00:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 22:00:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-06-05 22:00:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.2577639751552794) internal successors, (727), 322 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 727 transitions. [2021-06-05 22:00:07,217 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 727 transitions. Word has length 20 [2021-06-05 22:00:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:07,217 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 727 transitions. [2021-06-05 22:00:07,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 727 transitions. [2021-06-05 22:00:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:07,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:07,217 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:07,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5159,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:07,418 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash -345497223, now seen corresponding path program 617 times [2021-06-05 22:00:07,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:07,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144545538] [2021-06-05 22:00:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:07,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144545538] [2021-06-05 22:00:07,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144545538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:07,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723043971] [2021-06-05 22:00:07,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:07,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:00:07,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:08,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723043971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:08,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:08,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:08,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132167589] [2021-06-05 22:00:08,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:08,063 INFO L87 Difference]: Start difference. First operand 323 states and 727 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:08,944 INFO L93 Difference]: Finished difference Result 393 states and 843 transitions. [2021-06-05 22:00:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:00:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:08,945 INFO L225 Difference]: With dead ends: 393 [2021-06-05 22:00:08,945 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 22:00:08,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1065.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:00:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 22:00:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2021-06-05 22:00:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-06-05 22:00:08,948 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-06-05 22:00:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:08,948 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-06-05 22:00:08,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-06-05 22:00:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:08,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:08,948 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:09,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5171,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:09,149 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1196219667, now seen corresponding path program 618 times [2021-06-05 22:00:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:09,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757500512] [2021-06-05 22:00:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:09,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:09,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757500512] [2021-06-05 22:00:09,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757500512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:09,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257301364] [2021-06-05 22:00:09,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:09,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:09,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:09,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:09,764 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:09,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257301364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:09,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:09,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:09,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998039728] [2021-06-05 22:00:09,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:09,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:09,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:09,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:09,934 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:10,278 INFO L93 Difference]: Finished difference Result 338 states and 749 transitions. [2021-06-05 22:00:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:00:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:10,279 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:00:10,279 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 22:00:10,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 22:00:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-06-05 22:00:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-06-05 22:00:10,282 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-06-05 22:00:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:10,282 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-06-05 22:00:10,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-06-05 22:00:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:10,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:10,282 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:10,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5183 [2021-06-05 22:00:10,482 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -381122063, now seen corresponding path program 619 times [2021-06-05 22:00:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:10,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946004571] [2021-06-05 22:00:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:10,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:10,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946004571] [2021-06-05 22:00:10,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946004571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:10,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526412865] [2021-06-05 22:00:10,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:11,041 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:11,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526412865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:11,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:11,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111760151] [2021-06-05 22:00:11,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:11,214 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:12,614 INFO L93 Difference]: Finished difference Result 415 states and 880 transitions. [2021-06-05 22:00:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:00:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:12,615 INFO L225 Difference]: With dead ends: 415 [2021-06-05 22:00:12,615 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 22:00:12,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1709.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:00:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 22:00:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 325. [2021-06-05 22:00:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-06-05 22:00:12,618 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-06-05 22:00:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:12,618 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-06-05 22:00:12,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-06-05 22:00:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:12,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:12,618 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:12,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5195,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:12,819 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:12,819 INFO L82 PathProgramCache]: Analyzing trace with hash 125224203, now seen corresponding path program 620 times [2021-06-05 22:00:12,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:12,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755960968] [2021-06-05 22:00:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:13,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:13,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755960968] [2021-06-05 22:00:13,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755960968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:13,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22956436] [2021-06-05 22:00:13,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:13,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:13,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:13,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:13,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:13,383 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:13,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22956436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:13,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:13,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:13,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571093154] [2021-06-05 22:00:13,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:13,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:13,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:13,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:13,523 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:14,373 INFO L93 Difference]: Finished difference Result 378 states and 811 transitions. [2021-06-05 22:00:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:14,373 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:14,374 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:00:14,374 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 22:00:14,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1174.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:00:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 22:00:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 326. [2021-06-05 22:00:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.2553846153846155) internal successors, (733), 325 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 733 transitions. [2021-06-05 22:00:14,376 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 733 transitions. Word has length 20 [2021-06-05 22:00:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:14,376 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 733 transitions. [2021-06-05 22:00:14,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 733 transitions. [2021-06-05 22:00:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:14,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:14,377 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:14,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5207,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:14,577 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash 921959955, now seen corresponding path program 621 times [2021-06-05 22:00:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:14,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075763512] [2021-06-05 22:00:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:14,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:14,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075763512] [2021-06-05 22:00:14,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075763512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:14,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650361008] [2021-06-05 22:00:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:14,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:00:14,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:00:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:15,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650361008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:15,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:15,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:15,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503697287] [2021-06-05 22:00:15,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:15,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:15,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:15,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:15,196 INFO L87 Difference]: Start difference. First operand 326 states and 733 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:16,260 INFO L93 Difference]: Finished difference Result 414 states and 889 transitions. [2021-06-05 22:00:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:00:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:16,261 INFO L225 Difference]: With dead ends: 414 [2021-06-05 22:00:16,261 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:00:16,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1192.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:00:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:00:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 328. [2021-06-05 22:00:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2629969418960245) internal successors, (740), 327 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 740 transitions. [2021-06-05 22:00:16,264 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 740 transitions. Word has length 20 [2021-06-05 22:00:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:16,264 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 740 transitions. [2021-06-05 22:00:16,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 740 transitions. [2021-06-05 22:00:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:16,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:16,264 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:16,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5219,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:16,465 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1357910735, now seen corresponding path program 622 times [2021-06-05 22:00:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:16,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057589982] [2021-06-05 22:00:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:16,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:16,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057589982] [2021-06-05 22:00:16,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057589982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:16,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472690990] [2021-06-05 22:00:16,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:16,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:16,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:16,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:16,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:17,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472690990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:17,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:17,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:17,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687227879] [2021-06-05 22:00:17,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:17,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:17,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:17,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:17,118 INFO L87 Difference]: Start difference. First operand 328 states and 740 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:18,282 INFO L93 Difference]: Finished difference Result 380 states and 831 transitions. [2021-06-05 22:00:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:00:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:18,282 INFO L225 Difference]: With dead ends: 380 [2021-06-05 22:00:18,283 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:00:18,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1354.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:00:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:00:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 330. [2021-06-05 22:00:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-05 22:00:18,285 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-05 22:00:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:18,285 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-05 22:00:18,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-05 22:00:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:18,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:18,286 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:18,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5231 [2021-06-05 22:00:18,486 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:18,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:18,486 INFO L82 PathProgramCache]: Analyzing trace with hash -561174983, now seen corresponding path program 623 times [2021-06-05 22:00:18,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:18,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491665260] [2021-06-05 22:00:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:18,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:18,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491665260] [2021-06-05 22:00:18,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491665260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:18,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468539015] [2021-06-05 22:00:18,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:18,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:00:18,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:18,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:19,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468539015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:19,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:19,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:19,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660542030] [2021-06-05 22:00:19,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:19,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:19,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:19,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:19,220 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:20,562 INFO L93 Difference]: Finished difference Result 412 states and 877 transitions. [2021-06-05 22:00:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:00:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:20,563 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:00:20,563 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 22:00:20,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1587.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:00:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 22:00:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 330. [2021-06-05 22:00:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-05 22:00:20,566 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-05 22:00:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:20,566 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-05 22:00:20,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-05 22:00:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:20,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:20,566 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:20,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5246,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:20,766 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:20,767 INFO L82 PathProgramCache]: Analyzing trace with hash -54828717, now seen corresponding path program 624 times [2021-06-05 22:00:20,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:20,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790523875] [2021-06-05 22:00:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:20,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:20,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790523875] [2021-06-05 22:00:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790523875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:20,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562599537] [2021-06-05 22:00:20,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:20,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:00:20,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:00:20,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:21,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562599537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:21,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:21,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:21,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325720514] [2021-06-05 22:00:21,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:21,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:21,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:21,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:21,383 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:22,063 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-06-05 22:00:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:22,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:22,063 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:00:22,063 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:00:22,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:00:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:00:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 330. [2021-06-05 22:00:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-05 22:00:22,066 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-05 22:00:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:22,066 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-05 22:00:22,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-05 22:00:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:22,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:22,067 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:22,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5259,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:22,267 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1832686521, now seen corresponding path program 625 times [2021-06-05 22:00:22,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:22,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009386970] [2021-06-05 22:00:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:22,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:22,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009386970] [2021-06-05 22:00:22,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009386970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:22,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093663424] [2021-06-05 22:00:22,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:22,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:23,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093663424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:23,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:23,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:23,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139955736] [2021-06-05 22:00:23,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:23,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:23,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:23,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:23,120 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:23,377 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 22:00:23,552 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-05 22:00:23,710 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-06-05 22:00:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:23,914 INFO L93 Difference]: Finished difference Result 355 states and 781 transitions. [2021-06-05 22:00:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:00:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:23,915 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:00:23,915 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:00:23,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1212.0ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:00:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 331. [2021-06-05 22:00:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.2636363636363637) internal successors, (747), 330 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 747 transitions. [2021-06-05 22:00:23,917 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 747 transitions. Word has length 20 [2021-06-05 22:00:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:23,917 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 747 transitions. [2021-06-05 22:00:23,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 747 transitions. [2021-06-05 22:00:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:23,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:23,918 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:24,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5271 [2021-06-05 22:00:24,118 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 255344791, now seen corresponding path program 626 times [2021-06-05 22:00:24,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:24,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370245841] [2021-06-05 22:00:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:24,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:24,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370245841] [2021-06-05 22:00:24,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370245841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:24,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854621956] [2021-06-05 22:00:24,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:24,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:24,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:24,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:24,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:24,703 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854621956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:24,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:24,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:24,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788258158] [2021-06-05 22:00:24,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:24,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:24,887 INFO L87 Difference]: Start difference. First operand 331 states and 747 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:25,916 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-06-05 22:00:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:00:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:25,916 INFO L225 Difference]: With dead ends: 382 [2021-06-05 22:00:25,916 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 22:00:25,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1362.3ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:00:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 22:00:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 330. [2021-06-05 22:00:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-05 22:00:25,919 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-05 22:00:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:25,919 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-05 22:00:25,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-05 22:00:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:25,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:25,919 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5285,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:26,120 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:26,120 INFO L82 PathProgramCache]: Analyzing trace with hash 761691057, now seen corresponding path program 627 times [2021-06-05 22:00:26,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:26,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135953240] [2021-06-05 22:00:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:26,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135953240] [2021-06-05 22:00:26,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135953240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381973744] [2021-06-05 22:00:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:26,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:00:26,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:26,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:26,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:26,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381973744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:26,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:26,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:26,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387187409] [2021-06-05 22:00:26,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:26,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:26,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:26,792 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:27,999 INFO L93 Difference]: Finished difference Result 392 states and 842 transitions. [2021-06-05 22:00:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:00:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:27,999 INFO L225 Difference]: With dead ends: 392 [2021-06-05 22:00:27,999 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 22:00:28,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1472.7ms TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:00:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 22:00:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 330. [2021-06-05 22:00:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-05 22:00:28,002 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-05 22:00:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:28,002 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-05 22:00:28,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-05 22:00:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:28,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:28,003 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:28,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-06-05 22:00:28,203 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:28,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1366393994, now seen corresponding path program 628 times [2021-06-05 22:00:28,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:28,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438665745] [2021-06-05 22:00:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:00:28,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438665745] [2021-06-05 22:00:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438665745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175580884] [2021-06-05 22:00:28,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:28,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:28,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:28,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:00:28,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175580884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:28,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:00:28,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331497994] [2021-06-05 22:00:28,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:00:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:00:28,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:28,567 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:29,055 INFO L93 Difference]: Finished difference Result 383 states and 848 transitions. [2021-06-05 22:00:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:29,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:29,055 INFO L225 Difference]: With dead ends: 383 [2021-06-05 22:00:29,056 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 22:00:29,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:00:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 22:00:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2021-06-05 22:00:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2583586626139818) internal successors, (743), 329 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 743 transitions. [2021-06-05 22:00:29,058 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 743 transitions. Word has length 20 [2021-06-05 22:00:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:29,058 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 743 transitions. [2021-06-05 22:00:29,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 743 transitions. [2021-06-05 22:00:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:29,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:29,059 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:29,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:29,259 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1558426809, now seen corresponding path program 629 times [2021-06-05 22:00:29,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:29,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689428935] [2021-06-05 22:00:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:29,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:29,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689428935] [2021-06-05 22:00:29,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689428935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:29,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76113236] [2021-06-05 22:00:29,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:29,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:00:29,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:29,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76113236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:29,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:29,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:29,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662003251] [2021-06-05 22:00:29,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:29,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:29,926 INFO L87 Difference]: Start difference. First operand 330 states and 743 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:30,999 INFO L93 Difference]: Finished difference Result 412 states and 885 transitions. [2021-06-05 22:00:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:00:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:31,000 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:00:31,000 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 22:00:31,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1299.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:00:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 22:00:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 335. [2021-06-05 22:00:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.2574850299401197) internal successors, (754), 334 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 754 transitions. [2021-06-05 22:00:31,003 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 754 transitions. Word has length 20 [2021-06-05 22:00:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:31,003 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 754 transitions. [2021-06-05 22:00:31,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 754 transitions. [2021-06-05 22:00:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:31,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:31,003 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:31,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 630 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-06-05 22:00:31,205 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash -721443881, now seen corresponding path program 630 times [2021-06-05 22:00:31,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:31,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320954311] [2021-06-05 22:00:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:31,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:31,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320954311] [2021-06-05 22:00:31,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320954311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:31,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303265666] [2021-06-05 22:00:31,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:31,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:31,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:31,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:31,798 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:31,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303265666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:31,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:31,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:31,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063175902] [2021-06-05 22:00:31,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:31,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:31,922 INFO L87 Difference]: Start difference. First operand 335 states and 754 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:32,662 INFO L93 Difference]: Finished difference Result 382 states and 828 transitions. [2021-06-05 22:00:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:32,663 INFO L225 Difference]: With dead ends: 382 [2021-06-05 22:00:32,663 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:00:32,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1084.4ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:00:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:00:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 337. [2021-06-05 22:00:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-06-05 22:00:32,666 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-06-05 22:00:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:32,666 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-06-05 22:00:32,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-06-05 22:00:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:32,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:32,666 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:32,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5333 [2021-06-05 22:00:32,866 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:32,867 INFO L82 PathProgramCache]: Analyzing trace with hash 75291871, now seen corresponding path program 631 times [2021-06-05 22:00:32,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:32,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076257703] [2021-06-05 22:00:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:33,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:33,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076257703] [2021-06-05 22:00:33,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076257703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426304639] [2021-06-05 22:00:33,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:33,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426304639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:33,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:33,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317851924] [2021-06-05 22:00:33,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:33,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:33,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:33,471 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:34,178 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-06-05 22:00:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:34,179 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:00:34,179 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:00:34,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 899.0ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:00:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:00:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 337. [2021-06-05 22:00:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-06-05 22:00:34,182 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-06-05 22:00:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:34,182 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-06-05 22:00:34,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-06-05 22:00:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:34,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:34,182 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:34,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:34,382 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash 581638137, now seen corresponding path program 632 times [2021-06-05 22:00:34,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:34,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896193807] [2021-06-05 22:00:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:34,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:34,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896193807] [2021-06-05 22:00:34,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896193807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:34,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696787683] [2021-06-05 22:00:34,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:34,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:34,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:34,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:35,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696787683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:35,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:35,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:35,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600566144] [2021-06-05 22:00:35,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:35,088 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,515 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 22:00:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:35,743 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-06-05 22:00:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:00:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:35,744 INFO L225 Difference]: With dead ends: 404 [2021-06-05 22:00:35,744 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 22:00:35,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 990.2ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 22:00:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2021-06-05 22:00:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-06-05 22:00:35,747 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-06-05 22:00:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:35,747 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-06-05 22:00:35,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-06-05 22:00:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:35,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:35,747 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:35,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5357,633 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:35,948 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash 546013297, now seen corresponding path program 633 times [2021-06-05 22:00:35,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:35,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594479926] [2021-06-05 22:00:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:36,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:36,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594479926] [2021-06-05 22:00:36,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594479926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26973610] [2021-06-05 22:00:36,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:36,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:36,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 22:00:36,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:36,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26973610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:36,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:36,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738074952] [2021-06-05 22:00:36,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:36,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:36,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:36,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:36,582 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:37,361 INFO L93 Difference]: Finished difference Result 391 states and 851 transitions. [2021-06-05 22:00:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:00:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:37,361 INFO L225 Difference]: With dead ends: 391 [2021-06-05 22:00:37,361 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:00:37,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1067.6ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:00:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:00:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 340. [2021-06-05 22:00:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.253687315634218) internal successors, (764), 339 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 764 transitions. [2021-06-05 22:00:37,364 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 764 transitions. Word has length 20 [2021-06-05 22:00:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:37,364 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 764 transitions. [2021-06-05 22:00:37,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 764 transitions. [2021-06-05 22:00:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:37,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:37,364 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:37,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5369,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:37,569 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1342749049, now seen corresponding path program 634 times [2021-06-05 22:00:37,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:37,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329600355] [2021-06-05 22:00:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:37,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:37,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329600355] [2021-06-05 22:00:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329600355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:37,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215790462] [2021-06-05 22:00:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:37,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:37,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:37,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215790462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:38,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:38,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013102214] [2021-06-05 22:00:38,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:38,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:38,181 INFO L87 Difference]: Start difference. First operand 340 states and 764 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:38,830 INFO L93 Difference]: Finished difference Result 400 states and 870 transitions. [2021-06-05 22:00:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:38,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:38,830 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:00:38,830 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 22:00:38,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 842.4ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 22:00:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 339. [2021-06-05 22:00:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.2544378698224854) internal successors, (762), 338 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 762 transitions. [2021-06-05 22:00:38,833 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 762 transitions. Word has length 20 [2021-06-05 22:00:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:38,833 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 762 transitions. [2021-06-05 22:00:38,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 762 transitions. [2021-06-05 22:00:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:38,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:38,834 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:39,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5383,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:39,034 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1849095315, now seen corresponding path program 635 times [2021-06-05 22:00:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:39,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90211117] [2021-06-05 22:00:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:39,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90211117] [2021-06-05 22:00:39,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90211117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013602513] [2021-06-05 22:00:39,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:39,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:00:39,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:39,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013602513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:39,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:39,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:39,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557964143] [2021-06-05 22:00:39,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:39,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:39,775 INFO L87 Difference]: Start difference. First operand 339 states and 762 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:40,507 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-06-05 22:00:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:40,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:40,508 INFO L225 Difference]: With dead ends: 404 [2021-06-05 22:00:40,508 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 22:00:40,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 924.7ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 22:00:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 338. [2021-06-05 22:00:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.255192878338279) internal successors, (760), 337 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 760 transitions. [2021-06-05 22:00:40,511 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 760 transitions. Word has length 20 [2021-06-05 22:00:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:40,511 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 760 transitions. [2021-06-05 22:00:40,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:40,511 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 760 transitions. [2021-06-05 22:00:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:40,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:40,512 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:40,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5395 [2021-06-05 22:00:40,712 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash 365960377, now seen corresponding path program 636 times [2021-06-05 22:00:40,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:40,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417765334] [2021-06-05 22:00:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:40,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:40,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417765334] [2021-06-05 22:00:40,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417765334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:40,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119460958] [2021-06-05 22:00:40,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:40,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:00:40,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:40,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:00:40,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:41,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119460958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:41,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:41,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:41,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498192704] [2021-06-05 22:00:41,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:41,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:41,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:41,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:41,408 INFO L87 Difference]: Start difference. First operand 338 states and 760 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:42,024 INFO L93 Difference]: Finished difference Result 408 states and 886 transitions. [2021-06-05 22:00:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:42,025 INFO L225 Difference]: With dead ends: 408 [2021-06-05 22:00:42,025 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:00:42,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 861.1ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:00:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:00:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 339. [2021-06-05 22:00:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.257396449704142) internal successors, (763), 338 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 763 transitions. [2021-06-05 22:00:42,027 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 763 transitions. Word has length 20 [2021-06-05 22:00:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:42,028 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 763 transitions. [2021-06-05 22:00:42,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 763 transitions. [2021-06-05 22:00:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:42,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:42,028 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:42,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5407,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:42,228 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash 529174167, now seen corresponding path program 637 times [2021-06-05 22:00:42,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:42,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573548463] [2021-06-05 22:00:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:42,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:42,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573548463] [2021-06-05 22:00:42,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573548463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:42,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157913536] [2021-06-05 22:00:42,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:42,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:42,930 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 22:00:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:43,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157913536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:43,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:43,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:43,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915944752] [2021-06-05 22:00:43,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:43,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:43,132 INFO L87 Difference]: Start difference. First operand 339 states and 763 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:43,531 INFO L93 Difference]: Finished difference Result 360 states and 795 transitions. [2021-06-05 22:00:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:00:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:43,532 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:00:43,532 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 22:00:43,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 989.3ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 22:00:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2021-06-05 22:00:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-06-05 22:00:43,534 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-06-05 22:00:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:43,534 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-06-05 22:00:43,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-06-05 22:00:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:43,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:43,535 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:43,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5419 [2021-06-05 22:00:43,735 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:43,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1123779207, now seen corresponding path program 638 times [2021-06-05 22:00:43,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:43,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738294267] [2021-06-05 22:00:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:43,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:43,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738294267] [2021-06-05 22:00:43,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738294267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:43,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914133370] [2021-06-05 22:00:43,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:44,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:44,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:44,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:44,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914133370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:44,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:44,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:44,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142812525] [2021-06-05 22:00:44,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:44,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:44,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:44,463 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,163 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-06-05 22:00:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:45,448 INFO L93 Difference]: Finished difference Result 370 states and 811 transitions. [2021-06-05 22:00:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:45,449 INFO L225 Difference]: With dead ends: 370 [2021-06-05 22:00:45,449 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 22:00:45,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1230.8ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:00:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 22:00:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 343. [2021-06-05 22:00:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.257309941520468) internal successors, (772), 342 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 772 transitions. [2021-06-05 22:00:45,451 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 772 transitions. Word has length 20 [2021-06-05 22:00:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:45,451 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 772 transitions. [2021-06-05 22:00:45,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 772 transitions. [2021-06-05 22:00:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:45,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:45,452 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:45,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5431,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:45,652 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1593846359, now seen corresponding path program 639 times [2021-06-05 22:00:45,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:45,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249952227] [2021-06-05 22:00:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:45,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:45,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249952227] [2021-06-05 22:00:45,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249952227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:45,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551440269] [2021-06-05 22:00:45,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:45,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:00:45,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:45,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:45,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:46,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551440269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:46,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:46,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984623978] [2021-06-05 22:00:46,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:46,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:46,475 INFO L87 Difference]: Start difference. First operand 343 states and 772 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:48,395 INFO L93 Difference]: Finished difference Result 447 states and 939 transitions. [2021-06-05 22:00:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:00:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:48,395 INFO L225 Difference]: With dead ends: 447 [2021-06-05 22:00:48,395 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 22:00:48,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2135.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:00:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 22:00:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 342. [2021-06-05 22:00:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-06-05 22:00:48,398 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-06-05 22:00:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:48,398 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-06-05 22:00:48,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-06-05 22:00:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:48,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:48,399 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:48,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5446 [2021-06-05 22:00:48,599 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1688053151, now seen corresponding path program 640 times [2021-06-05 22:00:48,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:48,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292908262] [2021-06-05 22:00:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:48,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:48,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292908262] [2021-06-05 22:00:48,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292908262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:48,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738397885] [2021-06-05 22:00:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:48,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:49,240 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 22:00:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:49,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738397885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:49,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:49,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:49,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760085222] [2021-06-05 22:00:49,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:49,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:49,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:49,419 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:49,912 INFO L93 Difference]: Finished difference Result 361 states and 798 transitions. [2021-06-05 22:00:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:00:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:49,913 INFO L225 Difference]: With dead ends: 361 [2021-06-05 22:00:49,913 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:00:49,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:00:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-06-05 22:00:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-06-05 22:00:49,916 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-06-05 22:00:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:49,916 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-06-05 22:00:49,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-06-05 22:00:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:49,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:49,916 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:50,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5461 [2021-06-05 22:00:50,117 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash 110711421, now seen corresponding path program 641 times [2021-06-05 22:00:50,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:50,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493511685] [2021-06-05 22:00:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:50,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493511685] [2021-06-05 22:00:50,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493511685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134465823] [2021-06-05 22:00:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:50,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:00:50,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:50,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134465823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:50,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:50,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897175650] [2021-06-05 22:00:50,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:50,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:50,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:50,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:50,868 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:51,757 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 22:00:52,013 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-06-05 22:00:52,162 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 22:00:52,344 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-05 22:00:52,609 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-06-05 22:00:53,025 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 22:00:53,179 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 22:00:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:53,197 INFO L93 Difference]: Finished difference Result 428 states and 906 transitions. [2021-06-05 22:00:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:00:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:53,198 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:00:53,198 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:00:53,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2546.3ms TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:00:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:00:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 343. [2021-06-05 22:00:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.254385964912281) internal successors, (771), 342 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 771 transitions. [2021-06-05 22:00:53,201 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 771 transitions. Word has length 20 [2021-06-05 22:00:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:53,201 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 771 transitions. [2021-06-05 22:00:53,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 771 transitions. [2021-06-05 22:00:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:53,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:53,201 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:53,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:53,402 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash 617057687, now seen corresponding path program 642 times [2021-06-05 22:00:53,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:53,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146390077] [2021-06-05 22:00:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:53,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:53,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146390077] [2021-06-05 22:00:53,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146390077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:53,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929601183] [2021-06-05 22:00:53,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:53,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:00:53,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 22:00:53,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:54,022 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:54,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929601183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:54,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:54,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:54,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720330051] [2021-06-05 22:00:54,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:54,152 INFO L87 Difference]: Start difference. First operand 343 states and 771 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:54,802 INFO L93 Difference]: Finished difference Result 386 states and 839 transitions. [2021-06-05 22:00:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:54,803 INFO L225 Difference]: With dead ends: 386 [2021-06-05 22:00:54,803 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 22:00:54,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 988.8ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 22:00:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 345. [2021-06-05 22:00:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.252906976744186) internal successors, (775), 344 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 775 transitions. [2021-06-05 22:00:54,806 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 775 transitions. Word has length 20 [2021-06-05 22:00:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:54,806 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 775 transitions. [2021-06-05 22:00:54,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 775 transitions. [2021-06-05 22:00:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:54,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:54,806 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:55,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5487 [2021-06-05 22:00:55,007 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1951649017, now seen corresponding path program 643 times [2021-06-05 22:00:55,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:55,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953742765] [2021-06-05 22:00:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:55,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:55,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953742765] [2021-06-05 22:00:55,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953742765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:55,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285605087] [2021-06-05 22:00:55,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:55,559 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:00:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:55,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285605087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:55,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:55,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:55,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664393166] [2021-06-05 22:00:55,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:55,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:55,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:55,676 INFO L87 Difference]: Start difference. First operand 345 states and 775 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:56,575 INFO L93 Difference]: Finished difference Result 424 states and 902 transitions. [2021-06-05 22:00:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:00:56,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:56,576 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:00:56,576 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 22:00:56,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1089.8ms TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:00:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 22:00:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 344. [2021-06-05 22:00:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-06-05 22:00:56,578 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-06-05 22:00:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:56,579 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-06-05 22:00:56,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-06-05 22:00:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:56,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:56,579 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:56,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5499,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:56,779 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:56,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1413793439, now seen corresponding path program 644 times [2021-06-05 22:00:56,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:56,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067705542] [2021-06-05 22:00:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:56,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067705542] [2021-06-05 22:00:56,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067705542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475580505] [2021-06-05 22:00:56,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:57,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:57,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:57,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:00:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:57,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475580505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:57,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:57,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:57,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692672267] [2021-06-05 22:00:57,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:57,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:57,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:57,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:57,430 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:58,350 INFO L93 Difference]: Finished difference Result 416 states and 892 transitions. [2021-06-05 22:00:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:00:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:58,351 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:00:58,351 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:00:58,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1099.1ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:00:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:00:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 344. [2021-06-05 22:00:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-06-05 22:00:58,355 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-06-05 22:00:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:58,355 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-06-05 22:00:58,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-06-05 22:00:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:58,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:58,356 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:58,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5512 [2021-06-05 22:00:58,556 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1339456967, now seen corresponding path program 645 times [2021-06-05 22:00:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:58,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882535634] [2021-06-05 22:00:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882535634] [2021-06-05 22:00:58,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882535634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68491243] [2021-06-05 22:00:58,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:58,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:00:58,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:00:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68491243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:59,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:59,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:59,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789323317] [2021-06-05 22:00:59,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:59,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:59,263 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,715 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 22:00:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:59,949 INFO L93 Difference]: Finished difference Result 374 states and 819 transitions. [2021-06-05 22:00:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:59,950 INFO L225 Difference]: With dead ends: 374 [2021-06-05 22:00:59,950 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 22:00:59,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 978.1ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 22:00:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 347. [2021-06-05 22:00:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.254335260115607) internal successors, (780), 346 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 780 transitions. [2021-06-05 22:00:59,953 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 780 transitions. Word has length 20 [2021-06-05 22:00:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:59,953 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 780 transitions. [2021-06-05 22:00:59,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 780 transitions. [2021-06-05 22:00:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:59,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:59,953 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:00,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:00,154 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:00,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1378168599, now seen corresponding path program 646 times [2021-06-05 22:01:00,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:00,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018781399] [2021-06-05 22:01:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:00,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:00,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018781399] [2021-06-05 22:01:00,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018781399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774182529] [2021-06-05 22:01:00,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:00,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:00,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:00,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774182529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:00,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:00,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889137558] [2021-06-05 22:01:00,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:00,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:00,961 INFO L87 Difference]: Start difference. First operand 347 states and 780 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:01,540 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-06-05 22:01:02,491 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-06-05 22:01:02,694 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 22:01:02,832 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-05 22:01:03,066 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-06-05 22:01:03,404 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-05 22:01:03,621 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 22:01:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:03,639 INFO L93 Difference]: Finished difference Result 431 states and 914 transitions. [2021-06-05 22:01:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:01:03,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:03,640 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:01:03,640 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:01:03,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2953.2ms TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:01:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:01:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 346. [2021-06-05 22:01:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.252173913043478) internal successors, (777), 345 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 777 transitions. [2021-06-05 22:01:03,643 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 777 transitions. Word has length 20 [2021-06-05 22:01:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:03,643 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 777 transitions. [2021-06-05 22:01:03,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 777 transitions. [2021-06-05 22:01:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:03,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:03,643 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:03,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5539,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:03,844 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:03,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1884514865, now seen corresponding path program 647 times [2021-06-05 22:01:03,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:03,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641482190] [2021-06-05 22:01:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:04,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:04,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641482190] [2021-06-05 22:01:04,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641482190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:04,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113077967] [2021-06-05 22:01:04,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:04,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:01:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:04,431 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:01:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:04,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113077967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:04,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:04,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:04,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513102750] [2021-06-05 22:01:04,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:04,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:04,561 INFO L87 Difference]: Start difference. First operand 346 states and 777 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:05,418 INFO L93 Difference]: Finished difference Result 388 states and 843 transitions. [2021-06-05 22:01:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:05,419 INFO L225 Difference]: With dead ends: 388 [2021-06-05 22:01:05,419 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 22:01:05,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1179.6ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 22:01:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 348. [2021-06-05 22:01:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-06-05 22:01:05,422 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-06-05 22:01:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:05,422 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-06-05 22:01:05,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-06-05 22:01:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:05,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:05,422 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:05,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5553 [2021-06-05 22:01:05,622 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1075861101, now seen corresponding path program 648 times [2021-06-05 22:01:05,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:05,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727944045] [2021-06-05 22:01:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:05,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727944045] [2021-06-05 22:01:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727944045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650398841] [2021-06-05 22:01:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:05,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:01:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:06,193 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:01:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650398841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:06,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:06,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261195443] [2021-06-05 22:01:06,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:06,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:06,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:06,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:06,310 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:07,482 INFO L93 Difference]: Finished difference Result 416 states and 895 transitions. [2021-06-05 22:01:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:01:07,483 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:07,483 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:01:07,483 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:01:07,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1416.8ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:01:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:01:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 347. [2021-06-05 22:01:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.2514450867052025) internal successors, (779), 346 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-06-05 22:01:07,486 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-06-05 22:01:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:07,486 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-06-05 22:01:07,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-06-05 22:01:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:07,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:07,486 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:07,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5565,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:07,687 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1613716679, now seen corresponding path program 649 times [2021-06-05 22:01:07,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:07,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153179430] [2021-06-05 22:01:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:07,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:07,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153179430] [2021-06-05 22:01:07,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153179430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:07,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932343406] [2021-06-05 22:01:07,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:07,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:08,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932343406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:08,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:08,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:08,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129022171] [2021-06-05 22:01:08,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:08,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:08,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:08,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:08,293 INFO L87 Difference]: Start difference. First operand 347 states and 779 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:09,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:09,241 INFO L93 Difference]: Finished difference Result 418 states and 896 transitions. [2021-06-05 22:01:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:01:09,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:09,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:09,242 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:01:09,242 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:01:09,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1108.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:01:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:01:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 347. [2021-06-05 22:01:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.2514450867052025) internal successors, (779), 346 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-06-05 22:01:09,245 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-06-05 22:01:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:09,245 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-06-05 22:01:09,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-06-05 22:01:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:09,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:09,245 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:09,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:09,446 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash 401379927, now seen corresponding path program 650 times [2021-06-05 22:01:09,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:09,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135950113] [2021-06-05 22:01:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:09,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135950113] [2021-06-05 22:01:09,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135950113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073673079] [2021-06-05 22:01:09,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:09,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:10,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073673079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:10,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:10,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:10,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175628415] [2021-06-05 22:01:10,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:10,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:10,168 INFO L87 Difference]: Start difference. First operand 347 states and 779 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:11,305 INFO L93 Difference]: Finished difference Result 407 states and 874 transitions. [2021-06-05 22:01:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:01:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:11,305 INFO L225 Difference]: With dead ends: 407 [2021-06-05 22:01:11,305 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 22:01:11,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1352.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:01:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 22:01:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 349. [2021-06-05 22:01:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.25) internal successors, (783), 348 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 783 transitions. [2021-06-05 22:01:11,308 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 783 transitions. Word has length 20 [2021-06-05 22:01:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:11,308 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 783 transitions. [2021-06-05 22:01:11,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 783 transitions. [2021-06-05 22:01:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:11,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:11,309 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:11,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5590 [2021-06-05 22:01:11,509 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1198115679, now seen corresponding path program 651 times [2021-06-05 22:01:11,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:11,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818905549] [2021-06-05 22:01:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:11,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:11,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818905549] [2021-06-05 22:01:11,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818905549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:11,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079711673] [2021-06-05 22:01:11,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:11,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:01:11,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:11,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 22:01:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:12,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079711673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:12,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:12,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:12,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538820848] [2021-06-05 22:01:12,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:12,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:12,167 INFO L87 Difference]: Start difference. First operand 349 states and 783 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:12,955 INFO L93 Difference]: Finished difference Result 417 states and 892 transitions. [2021-06-05 22:01:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:01:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:12,955 INFO L225 Difference]: With dead ends: 417 [2021-06-05 22:01:12,955 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 22:01:12,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 997.9ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 22:01:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 348. [2021-06-05 22:01:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-06-05 22:01:12,958 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-06-05 22:01:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:12,958 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-06-05 22:01:12,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-06-05 22:01:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:12,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:12,958 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:13,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5605 [2021-06-05 22:01:13,159 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:13,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1704461945, now seen corresponding path program 652 times [2021-06-05 22:01:13,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:13,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710292092] [2021-06-05 22:01:13,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:13,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710292092] [2021-06-05 22:01:13,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710292092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690225471] [2021-06-05 22:01:13,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:13,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690225471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:13,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:13,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837450318] [2021-06-05 22:01:13,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:13,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:13,745 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:14,796 INFO L93 Difference]: Finished difference Result 422 states and 902 transitions. [2021-06-05 22:01:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:01:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:14,796 INFO L225 Difference]: With dead ends: 422 [2021-06-05 22:01:14,796 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:01:14,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1102.9ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:01:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:01:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 348. [2021-06-05 22:01:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-06-05 22:01:14,799 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-06-05 22:01:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:14,799 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-06-05 22:01:14,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-06-05 22:01:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:14,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:14,800 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:15,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5618,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:15,000 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash -702990113, now seen corresponding path program 653 times [2021-06-05 22:01:15,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:15,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708735021] [2021-06-05 22:01:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:15,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708735021] [2021-06-05 22:01:15,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708735021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689839282] [2021-06-05 22:01:15,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:15,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:01:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:15,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:15,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689839282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:15,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:15,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:15,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140230757] [2021-06-05 22:01:15,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:15,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:15,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:15,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:15,758 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,228 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 22:01:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:16,469 INFO L93 Difference]: Finished difference Result 376 states and 823 transitions. [2021-06-05 22:01:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:16,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:16,469 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:01:16,469 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:01:16,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1027.8ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:01:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 349. [2021-06-05 22:01:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.2528735632183907) internal successors, (784), 348 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 784 transitions. [2021-06-05 22:01:16,472 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 784 transitions. Word has length 20 [2021-06-05 22:01:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:16,472 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 784 transitions. [2021-06-05 22:01:16,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 784 transitions. [2021-06-05 22:01:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:16,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:16,473 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:16,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5630 [2021-06-05 22:01:16,673 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2014635453, now seen corresponding path program 654 times [2021-06-05 22:01:16,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:16,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794125260] [2021-06-05 22:01:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:16,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794125260] [2021-06-05 22:01:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794125260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678302685] [2021-06-05 22:01:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:16,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:01:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:17,242 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:01:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678302685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:17,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:17,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439720000] [2021-06-05 22:01:17,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:17,435 INFO L87 Difference]: Start difference. First operand 349 states and 784 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:18,203 INFO L93 Difference]: Finished difference Result 386 states and 843 transitions. [2021-06-05 22:01:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:18,204 INFO L225 Difference]: With dead ends: 386 [2021-06-05 22:01:18,204 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:01:18,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1112.1ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:01:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:01:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 350. [2021-06-05 22:01:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.2492836676217767) internal successors, (785), 349 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 785 transitions. [2021-06-05 22:01:18,206 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 785 transitions. Word has length 20 [2021-06-05 22:01:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:18,206 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 785 transitions. [2021-06-05 22:01:18,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 785 transitions. [2021-06-05 22:01:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:18,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:18,207 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:18,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5645,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:18,407 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:18,407 INFO L82 PathProgramCache]: Analyzing trace with hash -945740513, now seen corresponding path program 655 times [2021-06-05 22:01:18,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:18,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985013908] [2021-06-05 22:01:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:18,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985013908] [2021-06-05 22:01:18,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985013908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9035441] [2021-06-05 22:01:18,633 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 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:18,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:18,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:19,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9035441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:19,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:19,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:19,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944411179] [2021-06-05 22:01:19,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:19,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:19,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:19,150 INFO L87 Difference]: Start difference. First operand 350 states and 785 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:19,489 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 22:01:19,815 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 22:01:20,065 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-05 22:01:20,499 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-06-05 22:01:20,659 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 22:01:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:20,669 INFO L93 Difference]: Finished difference Result 406 states and 878 transitions. [2021-06-05 22:01:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:01:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:20,670 INFO L225 Difference]: With dead ends: 406 [2021-06-05 22:01:20,670 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 22:01:20,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1768.0ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:01:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 22:01:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 351. [2021-06-05 22:01:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.2514285714285713) internal successors, (788), 350 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-06-05 22:01:20,673 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-06-05 22:01:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:20,673 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-06-05 22:01:20,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,673 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-06-05 22:01:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:20,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:20,673 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:20,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5657,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:20,873 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:20,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1773985577, now seen corresponding path program 656 times [2021-06-05 22:01:20,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:20,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721780831] [2021-06-05 22:01:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:21,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:21,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721780831] [2021-06-05 22:01:21,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721780831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:21,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605480458] [2021-06-05 22:01:21,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:21,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:21,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:21,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:21,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:21,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605480458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:21,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:21,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:21,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531662942] [2021-06-05 22:01:21,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:21,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:21,531 INFO L87 Difference]: Start difference. First operand 351 states and 788 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:22,434 INFO L93 Difference]: Finished difference Result 402 states and 871 transitions. [2021-06-05 22:01:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:01:22,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:22,435 INFO L225 Difference]: With dead ends: 402 [2021-06-05 22:01:22,435 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 22:01:22,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1168.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:01:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 22:01:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 351. [2021-06-05 22:01:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.2514285714285713) internal successors, (788), 350 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-06-05 22:01:22,438 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-06-05 22:01:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:22,438 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-06-05 22:01:22,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-06-05 22:01:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:22,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:22,438 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:22,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5668 [2021-06-05 22:01:22,639 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:22,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1817095683, now seen corresponding path program 657 times [2021-06-05 22:01:22,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:22,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635618787] [2021-06-05 22:01:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635618787] [2021-06-05 22:01:22,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635618787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622464142] [2021-06-05 22:01:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:22,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:01:22,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 22:01:22,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:23,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622464142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:23,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:23,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:23,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671516800] [2021-06-05 22:01:23,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:23,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:23,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:23,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:23,348 INFO L87 Difference]: Start difference. First operand 351 states and 788 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:24,219 INFO L93 Difference]: Finished difference Result 404 states and 870 transitions. [2021-06-05 22:01:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:01:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:24,219 INFO L225 Difference]: With dead ends: 404 [2021-06-05 22:01:24,219 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 22:01:24,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:01:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 22:01:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 352. [2021-06-05 22:01:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.247863247863248) internal successors, (789), 351 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 789 transitions. [2021-06-05 22:01:24,222 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 789 transitions. Word has length 20 [2021-06-05 22:01:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:24,222 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 789 transitions. [2021-06-05 22:01:24,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 789 transitions. [2021-06-05 22:01:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:24,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:24,223 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:24,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5683 [2021-06-05 22:01:24,423 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:24,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1037846781, now seen corresponding path program 658 times [2021-06-05 22:01:24,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:24,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565382985] [2021-06-05 22:01:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:24,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565382985] [2021-06-05 22:01:24,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565382985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773218930] [2021-06-05 22:01:24,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:24,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:24,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:25,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773218930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:25,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:25,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:25,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291981526] [2021-06-05 22:01:25,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:25,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:25,091 INFO L87 Difference]: Start difference. First operand 352 states and 789 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:26,084 INFO L93 Difference]: Finished difference Result 412 states and 884 transitions. [2021-06-05 22:01:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:01:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:26,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:26,085 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:01:26,085 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 22:01:26,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1236.8ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:01:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 22:01:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 354. [2021-06-05 22:01:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.2464589235127477) internal successors, (793), 353 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 793 transitions. [2021-06-05 22:01:26,088 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 793 transitions. Word has length 20 [2021-06-05 22:01:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:26,088 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 793 transitions. [2021-06-05 22:01:26,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 793 transitions. [2021-06-05 22:01:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:26,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:26,088 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:26,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5697,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:26,289 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:26,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1834582533, now seen corresponding path program 659 times [2021-06-05 22:01:26,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:26,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413783394] [2021-06-05 22:01:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:26,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413783394] [2021-06-05 22:01:26,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413783394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948815557] [2021-06-05 22:01:26,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:26,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:01:26,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:26,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948815557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:26,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:26,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809141038] [2021-06-05 22:01:26,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:26,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:26,916 INFO L87 Difference]: Start difference. First operand 354 states and 793 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:27,831 INFO L93 Difference]: Finished difference Result 426 states and 910 transitions. [2021-06-05 22:01:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:27,832 INFO L225 Difference]: With dead ends: 426 [2021-06-05 22:01:27,832 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 22:01:27,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1136.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:01:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 22:01:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 356. [2021-06-05 22:01:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.2450704225352114) internal successors, (797), 355 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-06-05 22:01:27,835 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-06-05 22:01:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:27,835 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-06-05 22:01:27,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-06-05 22:01:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:27,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:27,835 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:28,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5712,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:28,036 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1954038497, now seen corresponding path program 660 times [2021-06-05 22:01:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:28,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569968890] [2021-06-05 22:01:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:28,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569968890] [2021-06-05 22:01:28,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569968890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185463333] [2021-06-05 22:01:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:28,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:28,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:28,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:28,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:28,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185463333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:28,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:28,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585624252] [2021-06-05 22:01:28,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:28,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:28,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:28,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:28,691 INFO L87 Difference]: Start difference. First operand 356 states and 797 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:29,689 INFO L93 Difference]: Finished difference Result 430 states and 918 transitions. [2021-06-05 22:01:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:01:29,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:29,689 INFO L225 Difference]: With dead ends: 430 [2021-06-05 22:01:29,689 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 22:01:29,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1155.5ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:01:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 22:01:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 356. [2021-06-05 22:01:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.2450704225352114) internal successors, (797), 355 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-06-05 22:01:29,692 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-06-05 22:01:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:29,692 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-06-05 22:01:29,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-06-05 22:01:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:29,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:29,693 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:29,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:29,893 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:29,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1989663337, now seen corresponding path program 661 times [2021-06-05 22:01:29,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:29,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756745877] [2021-06-05 22:01:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:30,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:30,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756745877] [2021-06-05 22:01:30,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756745877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:30,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404760607] [2021-06-05 22:01:30,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:30,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404760607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:30,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:30,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:30,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900830701] [2021-06-05 22:01:30,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:30,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:30,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:30,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:30,608 INFO L87 Difference]: Start difference. First operand 356 states and 797 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:31,660 INFO L93 Difference]: Finished difference Result 417 states and 894 transitions. [2021-06-05 22:01:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:01:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:31,661 INFO L225 Difference]: With dead ends: 417 [2021-06-05 22:01:31,661 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 22:01:31,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1310.8ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:01:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 22:01:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 359. [2021-06-05 22:01:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.2430167597765363) internal successors, (803), 358 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 803 transitions. [2021-06-05 22:01:31,664 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 803 transitions. Word has length 20 [2021-06-05 22:01:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:31,664 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 803 transitions. [2021-06-05 22:01:31,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 803 transitions. [2021-06-05 22:01:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:31,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:31,664 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:31,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5736 [2021-06-05 22:01:31,865 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:31,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1192927585, now seen corresponding path program 662 times [2021-06-05 22:01:31,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:31,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132905570] [2021-06-05 22:01:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:32,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:32,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132905570] [2021-06-05 22:01:32,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132905570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:32,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274917515] [2021-06-05 22:01:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:32,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:32,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:32,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274917515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:32,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:32,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:32,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903813508] [2021-06-05 22:01:32,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:32,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:32,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:32,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:32,555 INFO L87 Difference]: Start difference. First operand 359 states and 803 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:33,676 INFO L93 Difference]: Finished difference Result 431 states and 922 transitions. [2021-06-05 22:01:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:01:33,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:33,677 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:01:33,677 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 22:01:33,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1380.0ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:01:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 22:01:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 361. [2021-06-05 22:01:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.2444444444444445) internal successors, (808), 360 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-06-05 22:01:33,680 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-06-05 22:01:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:33,680 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-06-05 22:01:33,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-06-05 22:01:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:33,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:33,680 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:33,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5751,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:33,881 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:33,881 INFO L82 PathProgramCache]: Analyzing trace with hash -686581319, now seen corresponding path program 663 times [2021-06-05 22:01:33,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:33,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598436717] [2021-06-05 22:01:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:34,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:34,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598436717] [2021-06-05 22:01:34,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598436717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:34,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766831258] [2021-06-05 22:01:34,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:34,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:01:34,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:01:34,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766831258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512929110] [2021-06-05 22:01:34,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:34,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:34,519 INFO L87 Difference]: Start difference. First operand 361 states and 808 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:35,405 INFO L93 Difference]: Finished difference Result 431 states and 921 transitions. [2021-06-05 22:01:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:35,406 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:01:35,406 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 22:01:35,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 22:01:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 361. [2021-06-05 22:01:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.2444444444444445) internal successors, (808), 360 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-06-05 22:01:35,412 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-06-05 22:01:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:35,412 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-06-05 22:01:35,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-06-05 22:01:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:35,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:35,412 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:35,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5764,664 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:35,613 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2125251039, now seen corresponding path program 664 times [2021-06-05 22:01:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:35,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57128432] [2021-06-05 22:01:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:35,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:35,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57128432] [2021-06-05 22:01:35,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57128432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:35,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385654400] [2021-06-05 22:01:35,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:35,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:35,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:35,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:35,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:36,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385654400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:36,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:36,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:36,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713661916] [2021-06-05 22:01:36,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:36,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:36,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:36,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:36,252 INFO L87 Difference]: Start difference. First operand 361 states and 808 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:37,442 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-06-05 22:01:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:01:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:37,443 INFO L225 Difference]: With dead ends: 435 [2021-06-05 22:01:37,443 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 22:01:37,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1314.6ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:01:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 22:01:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 362. [2021-06-05 22:01:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.2437673130193905) internal successors, (810), 361 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 810 transitions. [2021-06-05 22:01:37,446 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 810 transitions. Word has length 20 [2021-06-05 22:01:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:37,446 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 810 transitions. [2021-06-05 22:01:37,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 810 transitions. [2021-06-05 22:01:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:37,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:37,447 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:37,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5776,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:37,647 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1847613177, now seen corresponding path program 665 times [2021-06-05 22:01:37,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:37,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037814572] [2021-06-05 22:01:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:37,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:37,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037814572] [2021-06-05 22:01:37,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037814572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728926146] [2021-06-05 22:01:37,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:37,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:01:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:38,211 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:01:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:38,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728926146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:38,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:38,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:38,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263167001] [2021-06-05 22:01:38,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:38,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:38,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:38,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:38,375 INFO L87 Difference]: Start difference. First operand 362 states and 810 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:38,783 INFO L93 Difference]: Finished difference Result 382 states and 841 transitions. [2021-06-05 22:01:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:38,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:38,784 INFO L225 Difference]: With dead ends: 382 [2021-06-05 22:01:38,784 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:01:38,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 753.5ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:01:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2021-06-05 22:01:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-06-05 22:01:38,787 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-06-05 22:01:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:38,787 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-06-05 22:01:38,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-06-05 22:01:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:38,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:38,787 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:38,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-06-05 22:01:38,988 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:38,988 INFO L82 PathProgramCache]: Analyzing trace with hash 270271447, now seen corresponding path program 666 times [2021-06-05 22:01:38,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:38,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906661668] [2021-06-05 22:01:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:39,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:39,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906661668] [2021-06-05 22:01:39,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906661668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956247428] [2021-06-05 22:01:39,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:39,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:01:39,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:39,568 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:01:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:39,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956247428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:39,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:39,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969847953] [2021-06-05 22:01:39,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:39,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:39,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:39,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:39,753 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:40,528 INFO L93 Difference]: Finished difference Result 406 states and 880 transitions. [2021-06-05 22:01:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:40,528 INFO L225 Difference]: With dead ends: 406 [2021-06-05 22:01:40,528 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 22:01:40,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1081.2ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:01:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 22:01:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 367. [2021-06-05 22:01:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-06-05 22:01:40,531 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-06-05 22:01:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:40,531 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-06-05 22:01:40,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-06-05 22:01:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:40,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:40,532 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:40,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5801,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:40,732 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:40,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:40,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1604862777, now seen corresponding path program 667 times [2021-06-05 22:01:40,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:40,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269781586] [2021-06-05 22:01:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:40,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:40,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269781586] [2021-06-05 22:01:40,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269781586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924792953] [2021-06-05 22:01:40,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:40,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:41,249 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:01:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:41,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924792953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:41,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:41,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:41,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422484343] [2021-06-05 22:01:41,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:41,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:41,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:41,434 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:42,691 INFO L93 Difference]: Finished difference Result 455 states and 963 transitions. [2021-06-05 22:01:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:01:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:42,692 INFO L225 Difference]: With dead ends: 455 [2021-06-05 22:01:42,692 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 22:01:42,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1321.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:01:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 22:01:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 365. [2021-06-05 22:01:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-06-05 22:01:42,695 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-06-05 22:01:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:42,695 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-06-05 22:01:42,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-06-05 22:01:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:42,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:42,695 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:42,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:42,896 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash 776617713, now seen corresponding path program 668 times [2021-06-05 22:01:42,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:42,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334631707] [2021-06-05 22:01:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:43,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334631707] [2021-06-05 22:01:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334631707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177659479] [2021-06-05 22:01:43,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:43,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:43,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:43,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:43,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:43,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177659479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:43,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:43,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:43,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465180890] [2021-06-05 22:01:43,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:43,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:43,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:43,566 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:44,705 INFO L93 Difference]: Finished difference Result 417 states and 901 transitions. [2021-06-05 22:01:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:01:44,706 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:44,706 INFO L225 Difference]: With dead ends: 417 [2021-06-05 22:01:44,706 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 22:01:44,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1378.1ms TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:01:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 22:01:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 366. [2021-06-05 22:01:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-06-05 22:01:44,709 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-06-05 22:01:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:44,709 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-06-05 22:01:44,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-06-05 22:01:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:44,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:44,709 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:44,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-06-05 22:01:44,910 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1573353465, now seen corresponding path program 669 times [2021-06-05 22:01:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:44,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857513069] [2021-06-05 22:01:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:45,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:45,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857513069] [2021-06-05 22:01:45,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857513069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989598996] [2021-06-05 22:01:45,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:45,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:01:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 22:01:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:45,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989598996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:45,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:45,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552991047] [2021-06-05 22:01:45,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:45,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:45,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:45,527 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:46,177 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-06-05 22:01:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:01:46,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:46,178 INFO L225 Difference]: With dead ends: 435 [2021-06-05 22:01:46,178 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 22:01:46,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 22:01:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 365. [2021-06-05 22:01:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-06-05 22:01:46,181 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-06-05 22:01:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:46,181 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-06-05 22:01:46,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-06-05 22:01:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:46,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:46,181 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:46,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:46,382 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash -706517225, now seen corresponding path program 670 times [2021-06-05 22:01:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:46,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541507519] [2021-06-05 22:01:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:46,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:46,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541507519] [2021-06-05 22:01:46,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541507519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:46,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996312490] [2021-06-05 22:01:46,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:46,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:46,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:46,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:46,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:47,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996312490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:47,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:47,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:47,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838516794] [2021-06-05 22:01:47,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:47,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:47,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:47,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:47,199 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:47,506 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 22:01:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:48,479 INFO L93 Difference]: Finished difference Result 418 states and 903 transitions. [2021-06-05 22:01:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:01:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:48,480 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:01:48,480 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 22:01:48,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1555.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:01:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 22:01:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 367. [2021-06-05 22:01:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-06-05 22:01:48,483 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-06-05 22:01:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:48,483 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-06-05 22:01:48,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-06-05 22:01:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:48,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:48,483 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:48,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:48,683 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:48,684 INFO L82 PathProgramCache]: Analyzing trace with hash 90218527, now seen corresponding path program 671 times [2021-06-05 22:01:48,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:48,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876566771] [2021-06-05 22:01:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:48,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:48,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876566771] [2021-06-05 22:01:48,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876566771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:48,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061616918] [2021-06-05 22:01:48,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:48,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:01:48,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:49,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061616918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:49,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:49,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:49,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313752295] [2021-06-05 22:01:49,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:49,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:49,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:49,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:49,289 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:50,203 INFO L93 Difference]: Finished difference Result 439 states and 937 transitions. [2021-06-05 22:01:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:01:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:50,203 INFO L225 Difference]: With dead ends: 439 [2021-06-05 22:01:50,203 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:01:50,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1115.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:01:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:01:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 366. [2021-06-05 22:01:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-06-05 22:01:50,206 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-06-05 22:01:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:50,206 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-06-05 22:01:50,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-06-05 22:01:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:50,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:50,207 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:50,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,407 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:50,407 INFO L82 PathProgramCache]: Analyzing trace with hash 596564793, now seen corresponding path program 672 times [2021-06-05 22:01:50,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:50,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602671526] [2021-06-05 22:01:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:50,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602671526] [2021-06-05 22:01:50,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602671526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:50,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757172690] [2021-06-05 22:01:50,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:50,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:51,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757172690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:51,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:51,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:51,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417797716] [2021-06-05 22:01:51,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:51,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:51,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:51,063 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:51,875 INFO L93 Difference]: Finished difference Result 440 states and 939 transitions. [2021-06-05 22:01:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:01:51,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:51,875 INFO L225 Difference]: With dead ends: 440 [2021-06-05 22:01:51,876 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 22:01:51,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 982.9ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 22:01:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2021-06-05 22:01:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-06-05 22:01:51,878 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-06-05 22:01:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:51,879 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-06-05 22:01:51,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-06-05 22:01:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:51,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:51,879 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:52,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5878,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:52,079 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash 560939953, now seen corresponding path program 673 times [2021-06-05 22:01:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:52,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141154760] [2021-06-05 22:01:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:52,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141154760] [2021-06-05 22:01:52,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141154760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31592510] [2021-06-05 22:01:52,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:52,691 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:01:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31592510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:52,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:52,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:52,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603605699] [2021-06-05 22:01:52,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:52,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:52,812 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:53,727 INFO L93 Difference]: Finished difference Result 419 states and 905 transitions. [2021-06-05 22:01:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:01:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:53,728 INFO L225 Difference]: With dead ends: 419 [2021-06-05 22:01:53,728 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:01:53,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1210.2ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:01:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2021-06-05 22:01:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.239782016348774) internal successors, (822), 367 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 822 transitions. [2021-06-05 22:01:53,730 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 822 transitions. Word has length 20 [2021-06-05 22:01:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:53,731 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 822 transitions. [2021-06-05 22:01:53,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 822 transitions. [2021-06-05 22:01:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:53,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:53,731 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:53,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5890 [2021-06-05 22:01:53,931 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:53,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1357675705, now seen corresponding path program 674 times [2021-06-05 22:01:53,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:53,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121443953] [2021-06-05 22:01:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:54,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:54,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121443953] [2021-06-05 22:01:54,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121443953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:54,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947856109] [2021-06-05 22:01:54,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:54,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:54,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947856109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:54,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:54,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:54,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402525811] [2021-06-05 22:01:54,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:54,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:54,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:54,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:54,562 INFO L87 Difference]: Start difference. First operand 368 states and 822 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:55,347 INFO L93 Difference]: Finished difference Result 439 states and 939 transitions. [2021-06-05 22:01:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:01:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:55,348 INFO L225 Difference]: With dead ends: 439 [2021-06-05 22:01:55,348 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 22:01:55,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 994.8ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 22:01:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 367. [2021-06-05 22:01:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-06-05 22:01:55,354 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-06-05 22:01:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:55,354 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-06-05 22:01:55,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-06-05 22:01:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:55,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:55,354 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:55,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:55,555 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1864021971, now seen corresponding path program 675 times [2021-06-05 22:01:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:55,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161770519] [2021-06-05 22:01:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:55,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161770519] [2021-06-05 22:01:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161770519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092902294] [2021-06-05 22:01:55,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:55,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:01:55,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:55,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:56,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092902294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:56,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:56,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827993342] [2021-06-05 22:01:56,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:56,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:56,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:56,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:56,185 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:57,394 INFO L93 Difference]: Finished difference Result 464 states and 980 transitions. [2021-06-05 22:01:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:01:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:57,395 INFO L225 Difference]: With dead ends: 464 [2021-06-05 22:01:57,395 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 22:01:57,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1377.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:01:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 22:01:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 370. [2021-06-05 22:01:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.238482384823848) internal successors, (826), 369 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-06-05 22:01:57,398 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-06-05 22:01:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:57,398 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-06-05 22:01:57,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-06-05 22:01:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:57,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:57,398 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:57,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5914 [2021-06-05 22:01:57,599 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 380887033, now seen corresponding path program 676 times [2021-06-05 22:01:57,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:57,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122711981] [2021-06-05 22:01:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:57,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122711981] [2021-06-05 22:01:57,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122711981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485467067] [2021-06-05 22:01:57,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:57,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:57,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:01:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485467067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:58,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:58,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:58,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15577688] [2021-06-05 22:01:58,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:58,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:58,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:58,218 INFO L87 Difference]: Start difference. First operand 370 states and 826 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:59,424 INFO L93 Difference]: Finished difference Result 445 states and 949 transitions. [2021-06-05 22:01:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:01:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:59,424 INFO L225 Difference]: With dead ends: 445 [2021-06-05 22:01:59,424 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 22:01:59,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1273.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:01:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 22:01:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 370. [2021-06-05 22:01:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.238482384823848) internal successors, (826), 369 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-06-05 22:01:59,427 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-06-05 22:01:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:59,427 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-06-05 22:01:59,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:59,427 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-06-05 22:01:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:59,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:59,428 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:59,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5926,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:59,628 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1197406807, now seen corresponding path program 677 times [2021-06-05 22:01:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:59,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383945299] [2021-06-05 22:01:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:59,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:59,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383945299] [2021-06-05 22:01:59,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383945299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:59,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415734736] [2021-06-05 22:01:59,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:59,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:01:59,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:01:59,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:00,259 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:02:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:00,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415734736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:00,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:00,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:02:00,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770077039] [2021-06-05 22:02:00,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:02:00,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:00,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:02:00,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:00,388 INFO L87 Difference]: Start difference. First operand 370 states and 826 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:00,910 INFO L93 Difference]: Finished difference Result 405 states and 886 transitions. [2021-06-05 22:02:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:02:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:00,911 INFO L225 Difference]: With dead ends: 405 [2021-06-05 22:02:00,911 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:02:00,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 938.0ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:02:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:02:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 375. [2021-06-05 22:02:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.235294117647059) internal successors, (836), 374 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 836 transitions. [2021-06-05 22:02:00,913 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 836 transitions. Word has length 20 [2021-06-05 22:02:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:00,914 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 836 transitions. [2021-06-05 22:02:00,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 836 transitions. [2021-06-05 22:02:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:00,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:00,914 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:01,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-06-05 22:02:01,114 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:01,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1762969159, now seen corresponding path program 678 times [2021-06-05 22:02:01,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:01,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850650251] [2021-06-05 22:02:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:01,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:01,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850650251] [2021-06-05 22:02:01,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850650251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:01,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766064436] [2021-06-05 22:02:01,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:01,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:02:01,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:01,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:02:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:01,669 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:02:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:01,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766064436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:01,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:02:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004447215] [2021-06-05 22:02:01,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:02:01,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:02:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:01,785 INFO L87 Difference]: Start difference. First operand 375 states and 836 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:02,602 INFO L93 Difference]: Finished difference Result 452 states and 959 transitions. [2021-06-05 22:02:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:02:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:02,603 INFO L225 Difference]: With dead ends: 452 [2021-06-05 22:02:02,603 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 22:02:02,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1042.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:02:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 22:02:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 374. [2021-06-05 22:02:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.2359249329758715) internal successors, (834), 373 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 834 transitions. [2021-06-05 22:02:02,606 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 834 transitions. Word has length 20 [2021-06-05 22:02:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:02,606 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 834 transitions. [2021-06-05 22:02:02,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 834 transitions. [2021-06-05 22:02:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:02,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:02,607 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:02,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5951,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:02,807 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1994142559, now seen corresponding path program 679 times [2021-06-05 22:02:02,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:02,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694257388] [2021-06-05 22:02:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:02,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694257388] [2021-06-05 22:02:02,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694257388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478644847] [2021-06-05 22:02:02,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:02:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:03,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478644847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:03,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:03,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:02:03,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576054270] [2021-06-05 22:02:03,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:02:03,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:02:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:03,375 INFO L87 Difference]: Start difference. First operand 374 states and 834 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:04,303 INFO L93 Difference]: Finished difference Result 448 states and 959 transitions. [2021-06-05 22:02:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:02:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:04,304 INFO L225 Difference]: With dead ends: 448 [2021-06-05 22:02:04,304 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 22:02:04,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1049.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:02:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 22:02:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 373. [2021-06-05 22:02:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-06-05 22:02:04,306 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-06-05 22:02:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:04,307 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-06-05 22:02:04,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-06-05 22:02:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:04,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:04,307 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:04,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5964,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:04,507 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1794478471, now seen corresponding path program 680 times [2021-06-05 22:02:04,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:04,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302969962] [2021-06-05 22:02:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:04,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302969962] [2021-06-05 22:02:04,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302969962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67878829] [2021-06-05 22:02:04,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:04,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:04,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:02:04,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:05,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67878829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:05,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:05,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:02:05,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058859965] [2021-06-05 22:02:05,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:02:05,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:02:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:05,154 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:06,076 INFO L93 Difference]: Finished difference Result 454 states and 960 transitions. [2021-06-05 22:02:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:02:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:06,077 INFO L225 Difference]: With dead ends: 454 [2021-06-05 22:02:06,077 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 22:02:06,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1154.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:02:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 22:02:06,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 373. [2021-06-05 22:02:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-06-05 22:02:06,080 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-06-05 22:02:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:06,080 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-06-05 22:02:06,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-06-05 22:02:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:06,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:06,080 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:06,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5976,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:06,281 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1017353887, now seen corresponding path program 681 times [2021-06-05 22:02:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:06,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753601122] [2021-06-05 22:02:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:06,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753601122] [2021-06-05 22:02:06,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753601122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132616794] [2021-06-05 22:02:06,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:06,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:02:06,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:02:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:07,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132616794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:07,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:07,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 22:02:07,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849087281] [2021-06-05 22:02:07,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:02:07,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:07,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:02:07,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:07,034 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,078 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 22:02:08,308 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-06-05 22:02:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:08,450 INFO L93 Difference]: Finished difference Result 462 states and 978 transitions. [2021-06-05 22:02:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:02:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:08,451 INFO L225 Difference]: With dead ends: 462 [2021-06-05 22:02:08,451 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 22:02:08,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1711.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:02:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 22:02:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 373. [2021-06-05 22:02:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-06-05 22:02:08,454 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-06-05 22:02:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:08,454 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-06-05 22:02:08,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-06-05 22:02:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:08,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:08,455 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:08,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5990 [2021-06-05 22:02:08,655 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2010156231, now seen corresponding path program 682 times [2021-06-05 22:02:08,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:08,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710664638] [2021-06-05 22:02:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:08,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:08,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710664638] [2021-06-05 22:02:08,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710664638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:08,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150408572] [2021-06-05 22:02:08,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:08,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:08,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:08,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:02:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 22:02:09,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6003 [2021-06-05 22:02:09,451 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:02:09,453 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:02:09,454 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:02:09,454 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:02:09 BasicIcfg [2021-06-05 22:02:09,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:02:09,455 INFO L168 Benchmark]: Toolchain (without parser) took 852052.42 ms. Allocated memory was 383.8 MB in the beginning and 520.1 MB in the end (delta: 136.3 MB). Free memory was 363.9 MB in the beginning and 408.9 MB in the end (delta: -45.0 MB). Peak memory consumption was 92.9 MB. Max. memory is 16.0 GB. [2021-06-05 22:02:09,455 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 383.8 MB. Free memory was 365.1 MB in the beginning and 365.0 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:02:09,455 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.00 ms. Allocated memory is still 383.8 MB. Free memory was 363.8 MB in the beginning and 362.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:02:09,455 INFO L168 Benchmark]: Boogie Preprocessor took 22.12 ms. Allocated memory is still 383.8 MB. Free memory was 362.3 MB in the beginning and 361.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:02:09,455 INFO L168 Benchmark]: RCFGBuilder took 373.57 ms. Allocated memory is still 383.8 MB. Free memory was 361.2 MB in the beginning and 365.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.0 GB. [2021-06-05 22:02:09,455 INFO L168 Benchmark]: TraceAbstraction took 851633.97 ms. Allocated memory was 383.8 MB in the beginning and 520.1 MB in the end (delta: 136.3 MB). Free memory was 365.3 MB in the beginning and 408.9 MB in the end (delta: -43.5 MB). Peak memory consumption was 92.8 MB. Max. memory is 16.0 GB. [2021-06-05 22:02:09,455 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 0.10 ms. Allocated memory is still 383.8 MB. Free memory was 365.1 MB in the beginning and 365.0 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.00 ms. Allocated memory is still 383.8 MB. Free memory was 363.8 MB in the beginning and 362.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.12 ms. Allocated memory is still 383.8 MB. Free memory was 362.3 MB in the beginning and 361.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 373.57 ms. Allocated memory is still 383.8 MB. Free memory was 361.2 MB in the beginning and 365.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 851633.97 ms. Allocated memory was 383.8 MB in the beginning and 520.1 MB in the end (delta: 136.3 MB). Free memory was 365.3 MB in the beginning and 408.9 MB in the end (delta: -43.5 MB). Peak memory consumption was 92.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 851569.4ms, OverallIterations: 689, TraceHistogramMax: 5, EmptinessCheckTime: 184.0ms, AutomataDifference: 395343.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19582 SDtfs, 43010 SDslu, 168322 SDs, 0 SdLazy, 276742 SolverSat, 16231 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 107217.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25257 GetRequests, 7816 SyntacticMatches, 1 SemanticMatches, 17440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85314 ImplicationChecksByTransitivity, 503521.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=375occurred in iteration=684, InterpolantAutomatonStates: 11892, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1300.7ms AutomataMinimizationTime, 688 MinimizatonAttempts, 25324 StatesRemovedByMinimization, 675 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2833.8ms SsaConstructionTime, 10886.3ms SatisfiabilityAnalysisTime, 290091.0ms InterpolantComputationTime, 25347 NumberOfCodeBlocks, 25347 NumberOfCodeBlocksAsserted, 2418 NumberOfCheckSat, 23978 ConstructedInterpolants, 2 QuantifiedInterpolants, 403996 SizeOfPredicates, 7360 NumberOfNonLiveVariables, 65991 ConjunctsInSsa, 24282 ConjunctsInUnsatCore, 1369 InterpolantComputations, 7 PerfectInterpolantSequences, 1779/19925 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